Many doors to multiculturalism

1. What is multiculturalism and who does it affect? To what extent has multiculturalism been embraced in different societies around the world, its believed that by 2050 people will have interacted between different societies around the world? What are the causes of multiculturalism and its effects on society?
2. There are different theories explaining multiculturalism. The theories explain why some societies have embraced multiculturalism while