decolonisation caused a significant increase in internal culture diversity many democracies, which gave rise to multiculturalism. the dominant understanding of multiculturalism and political practice is in terms of the housing and integration of minority immigrants. included are national minorities, indigenous peoples and immigrants from all cultures of the world. the concept of multiculturalism in current theory and practice has been limited by decolonisation, which affected countries differently depending on their national history and their position within the british empire.