Keywords: Geschichte 1800-2000 ; Migrationspolitik ; Sozialstruktur ; Einwanderung ; Brasilien ; Uruguay ; Argentinien ; Argentina / Emigration and immigration / Government policy / History ; Uruguay / Emigration and immigration / Government policy / History ; Social integration / Government policy / Argentina ; Social integration / Government policy / Uruguay ; Social integration / Government policy / Brazil ; Emigration and immigration / Government policy ; Social integration / Government policy ; Argentina ; Brazil ; Uruguay ; History ; Argentinien ; Uruguay ; Brasilien ; Einwanderung ; Migrationspolitik ; Sozialstruktur ; Geschichte 1800-2000