Ethno-nationalism is a form of nationalism where the 'nation' is defined primarily by shared ethnicity, culture, language, religion, or ancestry, rather than by shared citizenship or political ideology. From an anthropological lens, its resurgence can be understood by examining how groups construct and maintain their identities, boundaries, and narratives in response to various social, economic, and political forces.

Anthropological Lens on Ethno-nationalism: Anthropology focuses on culture, identity, social organization, and the symbolic meanings people attach to their groups. When applied to ethno-nationalism, it highlights:

1. The Construction of Identity: Ethnic identity is not static but is continually constructed and negotiated through shared symbols, rituals, myths, and historical narratives. Ethno-nationalism mobilizes these cultural elements to create a powerful sense of 'us' against 'them.'
2. Boundary Maintenance: Anthropologists study how groups define and maintain their boundaries. Ethno-nationalism often involves reinforcing these boundaries through cultural markers (language, dress, food, religious practices) and by emphasizing perceived differences from 'outsiders.'
3. Myth-making and Collective Memory: A crucial aspect is the creation and propagation of origin myths, shared histories (often romanticized or selectively remembered), and narratives of common suffering or glory. These narratives provide a powerful emotional foundation for ethnic solidarity and a sense of shared destiny.

Factors Contributing to the Resurgence of Ethno-nationalism (Anthropological Perspective):

1. Search for Belonging and Stability in a Globalized World: In an era of rapid globalization, migration, and cultural homogenization, many individuals experience a sense of rootlessness or identity crisis. Ethno-nationalism offers a strong, stable, and often primordial sense of belonging, providing comfort and meaning in a fluid world.
2. Cultural Preservation and Fear of Erosion: Globalization and increased migration can lead to fears of cultural dilution or loss of traditional ways of life. Ethno-nationalist movements often emerge as a defensive reaction, advocating for the preservation and promotion of a specific ethnic culture, language, or religion against perceived external threats.
3. Mobilization of Shared Grievances and Historical Injustices: Anthropologists examine how leaders and elites strategically mobilize existing ethnic sentiments by highlighting historical grievances, perceived injustices, or threats to the group's existence. These narratives can be powerful tools for political mobilization.
4. Symbolic Politics and Rituals: Ethno-nationalism thrives on symbolic politics, including the use of national flags, anthems, monuments, and public rituals (e.g., parades, commemorations of historical events). These symbols and rituals reinforce collective identity, emotional bonds, and a sense of shared purpose.
5. Response to Economic Disparities and Resource Competition: While not purely cultural, economic anxieties can be framed in ethnic terms. When one ethnic group perceives itself as economically disadvantaged or threatened by another, ethno-nationalist sentiments can be ignited, leading to demands for preferential treatment or exclusion of 'outsiders.'
6. Role of Media and Digital Platforms: Modern communication technologies play a significant role in the resurgence of ethno-nationalism. They facilitate the rapid dissemination of ethno-nationalist narratives, the creation of echo chambers, and the mobilization of like-minded individuals, often bypassing traditional gatekeepers of information.
7. Demographic Shifts and Migration: Large-scale migration can lead to demographic changes that are sometimes perceived as a threat to the cultural or ethnic homogeneity of a host nation. This can fuel nativist and ethno-nationalist sentiments, demanding stricter immigration controls or the assimilation of minority groups.
8. Reassertion of Indigenous Rights and Self-Determination: In some contexts, the resurgence of ethno-nationalism can also be linked to indigenous groups asserting their rights to self-determination, cultural autonomy, and land, often in response to historical oppression and marginalization.

In essence, the anthropological lens reveals that the resurgence of ethno-nationalism is not simply a political phenomenon but a deeply cultural one, rooted in how people understand themselves, their history, and their place in the world, often in reaction to perceived threats to their collective identity and way of life.