Migrations History 325 Emigration and immigration 217 Social conditions 127 Jews 105 African Americans 85 Ethnic relations 82 更多 ... Human beings 72 Migration, Internal 68 Immigrants 67 Ethnic identity 60 Antiquities 42 Race relations 42 Politics and government 40 Social aspects 36 Social life and customs 33 African diaspora 31 Africans 29 Rural-urban migration 29 Indians of North America 28 Black people 27 Economic conditions 26 Government policy 23 Transnationalism 22 Relocation 21 Population 20 Refugees 20 Ethnicity 19 Human geography 18 Chinese 16 少 ...