In a truly Diverse world there would be Italians in Italy, English in England, Irish in Ireland, Nigerians in Nigeria, Indians in India, Russians in Russia, French in France, Swedish in Sweden, Poles in Poland, Hungarians in Hungary, Chinese in China, Japanese in Japan, Icelanders in Iceland, Germans in Germany, etc. etc.
Homogenization of all cultures and nations is not diversity. It's actually a loss of diversity.