Canda and Us are the most diversely populated countries in the world because they where founded by colonist. Colonist came from Europe and brought slave from all over. For example they brought slaves from Africa, India, The Americas, etc. Through out the years slavery was abolished so the free people had there own families causing diversity. Also, America and Canada are highly developed countries and many people from undeveloped countries migrate to Canada and America.
Hope this helps!!! :))
