Why did Pierre Trudeau adopt an official policy of multiculturalism in 1971?

Pierre Trudeau adopted an official policy of multiculturalism in 1971 to recognize and celebrate Canada's diverse cultural heritage, fostering national unity while respecting individual identities. This policy aimed to promote inclusivity and ensure that all Canadians, regardless of their background, could contribute to and participate in society. By embracing multiculturalism, Trudeau sought to counteract the pressures of assimilation and highlight the importance of cultural pluralism in a rapidly changing Canada.