Nationalism is a political ideology that involves a strong identification of a group of individuals with a nation. There are two main perspectives on the origins and basis of nationalism, one is the primordialist perspective that describes nationalism as a reflection of the ancient and perceived evolutionary tendency of humans to organize into distinct grouping based on an affinity of birth; the other is the modernist perspective that describes nationalism as a recent phenomenon that requires the structural conditions of modern society, in order to exist. There are various definitions for what constitutes a nation, however, which leads to several different strands of nationalism. It can be a belief that citizenship in a state should be limited to one ethnic, cultural, religious, or identity group, or that multinationality in a single state should necessarily comprise the right to express and exercise national identity even by minorities.
The adoption of national identity in terms of historical development, has commonly been the result of a response by an influential group or groups that is unsatisfied with traditional identities due to inconsistency between their defined social order and the experience of that social order by its members, resulting in a situation of anomie that nationalists seek to resolve. This anomie results in a society or societies reinterpreting identity, retaining elements that are deemed acceptable and removing elements deemed unacceptable, in order to create a unified community. This development may be the result of internal structural issues or the result of resentment by an existing group or groups towards other communities, especially foreign powers that are or are deemed to be controlling them.
There are two major bodies of thought on the causes of nationalism, one is the modernist perspective that describes nationalism as a recent phenomenon that requires the structural conditions of modern society, in order to exist; the other is the primordialist perspective that describes nationalism as a reflection of the ancient and perceived evolutionary tendency of humans to organize into distinct grouping based on an affinity of birth. Roger Masters in The Nature of Politics says that both the primordialist and modernist conception of nationalism both involve an acceptance of three levels of common interest of individuals or groups in national identity. The first level is that at an inter-group level, humans respond to competition or conflict by organizing into groups to either attack other groups or defend their group from hostile groups. The second level is the intragroup level, individuals gain advantage through cooperation with others in securing collective goods that are not accessible through individual effort alone. The third level is the individual level, where self-interested concerns over personal fitness by individuals either consciously or subconsciously motivate the creation of group formation as a means of security. Leadership groups' or elites' behaviour that involves efforts to advance their own fitness when they are involved in the mobilization of an ethnic or national group is crucial in the development of the culture of that group.
The primordialist perspective is based upon evolutionary theory. The evolutionary theory of nationalism perceives nationalism to be the result of the evolution of human beings into identifying with groups, such as ethnic groups, or other groups that form the foundation of a nation. Roger Masters in The Nature of Politics describes the primordial explanation of the origin of ethnic and national groups as recognizing group attachments that are thought to be unique, emotional, intense, and durable because they are based upon kinship and promoted along lines of common ancestry.
The primordialist evolutionary view of nationalism has its origins in the evolutionary theories of Charles Darwin that were later substantially elaborated by John Tooby and Leda Cosmides. Central to evolutionary theory is that all biological organisms undergo changes in their anatomical features and their characteristic behaviour patterns. Darwin's theory of natural selection as a mechanism of evolutionary change of organisms is utilized to describe the development of human societies and particularly the development of mental and physical traits of members of such societies.
In addition to evolutionary development of mental and physical traits, Darwin and other evolutionary theorists emphasize the influence of the types of environment upon behaviour. First of all there are ancestral environments that are typically long-term and stable forms of situations that influence mental development of individuals or groups gained either biologically through birth or learned from family or relatives, that cause the emphasis of certain mental behaviours that are developed due to their necessity the ancestral environment . In national group settings, these ancestral environments can result in psychological triggers in the minds of individuals within a group, such as responding positively to patriotic cues. There are immediate environments that are those situations that confront an individual or group at a given point and activate certain mental responses. In the case of a national group, the example of seeing the mobilization of a foreign military force on the nation's borders may provoke members of a national group to unify and mobilize themselves in response. There are proximate environments where individuals identify nonimmediate real or imagined situations in combination with immediate situations that make individuals confront a common situation of both subjective and objective components that affect their decisions. As such proximate environments cause people make decisions based on existing situations and anticipated situations. In the context of the politics of nations and nationalism, a political leader may adopt an international treaty not out of a benevolent stance but in the believe that such a treaty will either benefit their nation or will increase the prestige of their nation. The proximate environment plays a role in the politics of nations that are angry with their circumstances, an individual or group that becomes angry in response to feelings that they are being exploited usually results in efforts to accommodate them, while being passive results in them being ignored.Nations that are angry with circumstances imposed on them by others are affected by the proximate environment that shapes the nationalism of such nations.
Pierre van der Berghe in The Ethnic Phenomenon (1981) emphasizes the role of ethnicity and kinship involving family biological ties to members of an ethnic group as being an important element of national identity. Van der Berghe states the sense of family attachments among related people as creating durable, intense, emotional, and cooperative attachments, that he claims are utilized within ethnic groups.. Van der Berghe identifies genetic-relatedness as being a basis for the durable attachments of family groups, as genetic ties cannot be removed and they are passed on from generation to generation. Van der Berge identifies common descent as the basis for the establishment of boundaries of ethnic groups, as most people to not join ethnic groups but are born into them. Berghe notes that this kinship group affiliation and solidarity does not require actual relatedness but can include imagined relatedness that may not be biologically accurate. Berghe notes that feelings of ethnic solidarity usually arise in small and compact groups whereas there is less solidarity in large and dispersed groups.
There are functionalist interpretations of the primordialist evolutionary theory. The functionalists claim that ethnic and national groups are founded upon individuals' concerns over distribution of resources acquired through individual and collective action. This is resolved by the formation of a clan group that defines who is accepted within the group and defines the boundaries within which the resources will be distributed. This functionalist interpretation does not require genetic-relatedness, and identifies a variety of reasons for ethnic or national group formation. The first reason is that such groups may extend group identity and cooperation beyond the limited of family and kinship out of reciprocal altruism, in the belief that helping other individuals will produce an advantageous situation for both the sender and receiver of that help, this tendency has been noted in studies by Robert Axelrod that are summarized in his book The Evolution of Cooperation(1984). The second reason is that such groups may be formed as a means of defense to insure survival, fears by one group of a hostile group threatening them can increase solidarity amongst that group, R. Paul Shaw and Yuwa Wong in their book The Genetic Seeds of Warfare (1989) identify this as the foundation of xenophobia that they identify as originating in hunter gatherer societies.
Beginning in 1821, the Greek War of Independence began as a rebellion by Greek nationalists against the ruling Ottoman Empire.
The modernist interpretation of nationalism and nation-building perceives that nationalism arises and flourishes in modern societies described as being associated with having: an industrial economy capable of self-sustainability of the society, a central supreme authority capable of maintaining authority and unity, and a centralized language or small group of centralized languages understood by a community of people. Modernist theorists note that this is only possible in modern societies, while traditional societies typically: lack a modern industrial self-sustainable economy, have divided authorities, have multiple languages resulting in many people being unable to communicate with each other.
Karl Marx wrote about the creation of nations as requiring a bourgeois revolution and an industrial economy. Marx applied the modern versus traditional parallel to British colonial rule in India that Marx saw in positive terms as he claimed that British colonial rule was developing India, bringing India out of its "rural idiocy" of its "feudalism". However Marx's theories at the time of his writing had little impact on academic thinking on the development of nation states.
Prominent theorists who developed the modernist interpretation of nations and nationalism include: Henry Maine, Ferdinand Tönnies, Emile Durkheim,Max Weber, and Talcott Parsons.
Henry Maine in his analysis of the historical changes and development of human societies noted the key distinction between traditional societies defined as "status" societies based on family association and functionally diffuse roles for individuals; and modern societies defined as "contract" societies where social relations are determined by rational contracts pursued by individuals to advance their interests. Maine saw the development of societies as moving away from traditional status societies to modern contract societies.
Ferdinand Tönnies in his book Gemeinschaft und Gesellschaft (1887) defined a gemeinschaft (community) as being based on emotional attachments as attributed with traditional societies, while defining a gessellschaft (society) as an impersonal societies that are modern. While he recognized the advantages of modern societies he also criticized them for their cold and impersonal nature that caused alienation while praising the intimacy of traditional communities.
Emile Durkheim expanded upon Tönnies' recognition of alienation, and defined the differences between traditional and modern societies as being between societies based upon "mechanical solidarity" versus societies based on "organic solidarity". Durkheim identified mechanical solidarity as involving custom, habit, and repression that was necessary to maintain shared views.Durkheim identified organic solidarity-based societies as modern societies where there exists a division of labour based on social differentiation that causes alienation. Durkheim claimed that social integration in traditional society required authoritarian culture involving acceptance of a social order. Durkheim claimed that modern society bases integration on the mutual benefits of the division of labour, but noted that the impersonal character of modern urban life caused alienation and feelings of anomie.
Max Weber claimed the change that developed modern society and nations is the result of the rise of a charismatic leader to power in a society who creates a new tradition or a rational-legal system that establishes the supreme authority of the state. Weber's conception of charismatic authority has been noted as the basis of many nationalist governments.
Civic nationalism (also known as liberal nationalism) defines the nation as an association of people who identify themselves as belonging to the nation, who have equal and shared political rights, and allegiance to similar political procedures. According to the principles of civic nationalism, the nation is not based on common ethnic ancestry, but is a political entity whose core identity is not ethnicity. This civic concept of nationalism is exemplified by Ernest Renan in his lecture in 1882 "What is a Nation?", where he defined the nation as a "daily referendum" (frequently translated 'daily plebiscite") dependent on the will of its people to continue living together".
Civic Nationalism is a kind of non-xenophobic nationalism compatible with liberal values of freedom, tolerance, equality, and individual rights. Ernest Renan and John Stuart Mill are often thought to be early liberal nationalists. Liberal nationalists often defend the value of national identity by saying that individuals need a national identity in order to lead meaningful, autonomous lives and that liberal democratic polities need national identity in order to function properly.
Civic nationalism lies within the traditions of rationalism and liberalism, but as a form of nationalism it is contrasted with ethnic nationalism. Membership of the civic nation is considered voluntary, as in Ernest Renan's "daily referendum" formulation in What is a Nation?. Civic-national ideals influenced the development of representative democracy in countries such as the United States and France(see the United States Declaration of Independence of 1776, and the Declaration of the Rights of Man and of the Citizen of 1789).
Whereas nationalism does not necessarily imply a belief in the superiority of one ethnicity over others, some nationalists support ethnocentric protectionism or ethnocentric supremacy. Studies have yielded evidence that such behaviour may be derived from innate preferences in humans from infancy.[need quotation to verify][verification needed]
Some nationalists exclude certain groups. Some nationalists, defining the national community in ethnic, linguistic, cultural, historic, or religious terms (or a combination of these), may then seek to deem certain minorities as not truly being a part of the 'national community' as they define it. Sometimes a mythic homeland is more important for the national identity than the actual territory occupied by the nation.
Left-wing nationalism (occasionally known as socialist nationalism, not to be confused with Right-wing national socialism) refers to any political movement that combines left-wing politics with nationalism. Many nationalist movements are dedicated to national liberation, in the view that their nations are being persecuted by other nations and thus need to exercise self-determination by liberating themselves from the accused persecutors. Anti-revisionist Marxist-Leninism links itself closely with this ideology, although many left-wing nationalists refute the assertion that Anti-Revisionists are truly "left-wing nationalists." Practical examples of this anti-revisionist nationalism include Stalin's early work Marxism and the National Question and his Socialism in One Countryedict, which declares that nationalism can be used in an internationalist context, fighting for national liberation without racial or religious divisions. Other examples of left-wing nationalism includeFidel Castro's 26th of July Movement that launched the Cuban Revolution ousting the American-backed Fulgencio Batista in 1959, Ireland's Sinn Féin, Wales's Plaid Cymru, Scotland's SNP, theAwami League in Bangladesh and the African National Congress in South Africa. Truly left-wing nationalism (that which does not involve authoritarianism and inequality between ethnic groups or citizens, and that which includes public ownership of industries and services) is a type of civic nationalism, although some nationalists who are ostensibly socialist, such as Stalinists, are not civic nationalists. This can give rise to confusion over the nature of left-wing nationalism, even though in its condition of being left-wing is implicit respect for other nations and ethnic groups, and a non-authoritarian state.
Nationalist slogan "Brazil, love it or leave it", often used during the Brazilian military dictatorship.
Territorial nationalists assume that all inhabitants of a particular nation owe allegiance to their country of birth or adoption. A sacred quality is sought in the nation and in the popular memories it evokes. Citizenship is idealised by territorial nationalist A criterion of a territorial nationalism is the establishment of a mass, public culture based on common values and traditions of the population.
Pan-nationalism is unique in that it covers a large area span. Pan-nationalism focuses more on "clusters" of ethnic groups.
Proto-nationalism refers to the nationalism that people feel for a connection to a particular indigenous or ethnic identity which is unconnected from the national identity. It also refers to a "nationalism" that existed before the foundation of a nation-state. It thus describes a nation-less nationalism.
Benito Mussolini (left) and Adolf Hitler(right). The two most pre-eminent figures offascism in Europe.
Ultranationalism is a zealous nationalism that expresses extremist support for one's nationalist ideals. It is often characterized by authoritarianism, efforts toward reduction or stoppage of immigration, expulsion and or oppression of non-native populations within the nation or its territories, demagoguery of leadership, emotionalism, fomenting talk of presumed, real, or imagined enemies, predicating the existence of threats to the survival of the native, dominant or otherwise idealized national ethnicity or population group, instigation or extremist reaction to crack-down policies in law enforcement, efforts to limit international trade through tariffs, tight control over businesses and production, militarism, populism and propaganda. Prevalent ultranationalism typically leads to or is the result of conflict within a state, and or between states, and is identified as a condition of pre-war in national politics. In its extremist forms ultranationalism is characterized as a call to war against enemies of the nation/state, secession or, in the case of ethnocentrist ultranationalism, genocide.
Fascism is a form of palingenetic ultranationalism that promotes "class collaboration" (as opposed to class struggle), a totalitarian state, andirredentism or expansionism to unify and allow the growth of a nation. Fascists sometimes promote ethnic or cultural nationalism. Fascism stresses the subservience of the individual to the state, and the need to absolute and unquestioned loyalty to a strong ruler.
This form of nationalism came about during the decolonialisation of the post war period. It was a reaction mainly in Africa and Asia against being subdued by foreign powers. This form of nationalism took many guises, including the peaceful passive resistance movement led by Gandhi in the Indian subcontinent  Benedict Anderson argued that anti-colonial nationalism is grounded in the experience of literate and bilingual indigenous intellectuals fluent in the language of the imperial power, schooled in its "national" history, and staffing the colonial administrative cadres up to but not including its highest levels. Post-colonial national governments have been essentially indigenous forms of the previous imperial administration.
Critics of nationalism have argued that it is often unclear what constitutes a "nation", or why a nation should be the only legitimate unit of political rule. A nation is a cultural entity, and not necessarily a political association, nor is it necessarily linked to a particular territorial area - although nationalists argue that the boundaries of a nation and a state should, as far as possible, coincide. Philosopher A.C. Grayling describes nations as artificial constructs, "their boundaries drawn in the blood of past wars". He argues that "there is no country on earth which is not home to more than one different but usually coexisting culture. Cultural heritage is not the same thing as national identity".
Much of the early opposition to nationalism was related to its geopolitical ideal of a separate state for every nation. The classic nationalist movements of the 19th century rejected the very existence of the multi-ethnic empires in Europe. Even in that early stage, however, there was an ideological critique of nationalism. That has developed into several forms of anti-nationalism in the western world naming it a 'theoretical and political challenge for the foreseeable future' . The Islamic revival of the 20th century also produced an Islamic critique of the nation-state.
At the end of the 19th century, Marxists and other socialists (such as Rosa Luxemburg) produced political analysis that were critical of the nationalist movements then active in central andeastern Europe (though a variety of other contemporary socialists and communists, from Vladimir Lenin (a communist) to Józef Piłsudski (a socialist), were more sympathetic to national self-determination).
In his classic essay on the topic George Orwell distinguishes nationalism from patriotism, which he defines as devotion to a particular place. Nationalism, more abstractly, is "power-hunger tempered by self-deception." 
For Orwell the nationalist is more likely than not dominated by irrational negative impulses:
There are, for example, Trotskyists who have become simply enemies of the U.S.S.R. without developing a corresponding loyalty to any other unit. When one grasps the implications of this, the nature of what I mean by nationalism becomes a good deal clearer. A nationalist is one who thinks solely, or mainly, in terms of competitive prestige. He may be a positive or a negative nationalist — that is, he may use his mental energy either in boosting or in denigrating — but at any rate his thoughts always turn on victories, defeats, triumphs and humiliations. He sees history, especially contemporary history, as the endless rise and decline of great power units, and every event that happens seems to him a demonstration that his own side is on the upgrade and some hated rival is on the downgrade. But finally, it is important not to confuse nationalism with mere worship of success. The nationalist does not go on the principle of simply ganging up with the strongest side. On the contrary, having picked his side, he persuades himself that it is the strongest, and is able to stick to his belief even when the facts are overwhelmingly against him.
Massacres of Poles in Volhynia in 1943. Most Poles of Volhynia (now in Ukraine) had either been murdered or had fled the area.
In the liberal political tradition there is widespread criticism of ‘nationalism’ as a dangerous force and a cause of conflict and war between nation-states. Nationalism has often been exploited to encourage citizens to partake in the nations' conflicts. Such examples include The Two World Wars, where nationalism was a key component of propaganda material. Liberals do not generally dispute the existence of the nation-states. The liberal critique also emphasizes individual freedom as opposed to national identity, which is by definition collective.
The pacifist critique of nationalism also concentrates on the violence of nationalist movements, the associated militarism, and on conflicts between nations inspired by jingoism or chauvinism. National symbols and patriotic assertiveness are in some countries discredited by their historical link with past wars, especially in Germany. Famous pacifist Bertrand Russell criticizes nationalism for diminishing the individual's capacity to judge his or her fatherland's foreign policy. Albert Einstein stated that "Nationalism is an infantile disease... It is the measles of mankind." 
The anti-racist critique of nationalism concentrates on the attitudes to other nations, and especially on the doctrine that the nation-state exists for one national group to the exclusion of others. This view emphasizes the chauvinism and xenophobia that have often resulted from nationalist sentiment.Norman Naimark relates the rise of nationalism to ethnic cleansing and genocide.
Political movements of the left have often been suspicious of nationalism, again without necessarily seeking the disappearance of the existing nation-states. Marxism has been ambiguous towards the nation-state, and in the late 19th century some Marxist theorists rejected it completely. For some Marxists the world revolution implied a global state (or global absence of state); for others it meant that each nation-state had its own revolution. A significant event in this context was the failure of the social-democratic and socialistmovements in Europe to mobilize a cross-border workers' opposition to World War I. At present most, but certainly not all, left-wing groups accept the nation-state, and see it as the political arenafor their activities.
A snack bar sign advertising "American" fries at Knott's Berry Farm. The sign formerly read "French".
In the Western world, the most comprehensive current ideological alternative to nationalism is cosmopolitanism. Ethical cosmopolitanism rejects one of the basic ethical principles of nationalism: that humans owe more duties to a fellow member of the nation, than to a non-member. It rejects such important nationalist values as national identity and national loyalty. However, there is also a political cosmopolitanism, which has a geopolitical program to match that of nationalism: it seeks some form of world state, with a world government. Very few people openly and explicitly support the establishment of a global state, but political cosmopolitanism has influenced the development of international criminal law, and the erosion of the status of national sovereignty. In turn, nationalists are deeply suspicious of cosmopolitan attitudes, which they equate with eradication of diverse national cultures.
While internationalism in the cosmopolitan context by definition implies cooperation among nations and states, and therefore the existence of nations,proletarian internationalism is different, in that it calls for the international working class to follow its brethren in other countries irrespective of the activities or pressures of the national government of a particular sector of that class. Meanwhile, anarchists reject nation-states on the basis of self-determination of the majority social class, and thus reject nationalism. Instead of nations, anarchists usually advocate the creation of cooperative societies based on free association and mutual aid without regard to ethnicity or race