Nope. Common sense. Look at former Yugoslavia. Same race of people but 6 different cultures and three different religions all forced to live together. Ended up in civil war. Soviet union. Same thing. What the English did to the Irish and Scottish. Same race of people. Humans are just stupid, ignorant and evil. But Marxists always think they can beat nature and force everyone to live in harmony instead of just letting things be. Good people of all races always get along. It's the selfish assholes in each race that causes problems. Because they are seething with fear, hatred and anger and prance about with their false virtue signalling to hide their deeply hidden attachments.