Pantoun (Malayan) For thousands of years, Invasion, migration, immigration, and slavery, As well as the advent of cities, all have induced or contributed to The forced assimilation of different genes, societies, and cultures. Invasion, migration, immigration, and slavery, Occur when entire communities are overpowered by enemies. The aggressors may replace the previous culture with their own, Mix the new with the old, or simply modify the existing culture in new ways. The aggressors often replace the previous culture with their own, Creating a mix of different populations. Human populations can be broadly grouped (in alphabetical order) as Africans, Arabs, Asians, Europeans, and Hybrids. When a mix of Africans, Arabs, Asians, or Europeans Create an offspring, the result is a hybrid generation. When a hybrid generation emerges, The assimilation of the two previous groups has begun. Assimilation is a form of globalization. Ironically, the assimilation of the two previous groups Represents a tendency toward cultural inbreeding. The more assimilated the world population becomes, the less diverse.