Mark Twain tells the story of the differences he found between the animal world and the human world. Animals, he said, are more reasonable, and he proved it by teaching a cat and a dog to be friends, then putting them in a cage with a rabbit, whom they learned to accept. He gradually added a fox, a squirrel, a goose, and some doves, and finally a monkey.
He tried the same procedure with humans by putting in a cage a Roman Catholic from Tipperary and a Presbyterian from Aberdeen. Then a Greek Christian, a Muslim, a Methodist from Arkansas, a Buddhist and a Salvation Army Colonel from Wapping.
After a time, he checked the cage of animals; they were living quite peaceably together. When he checked the cage of humans, he found a gory chaos of turbans and fezzes and plaids and bones. No one left alive. And he says, “These Reasoning Animals had disagreed on a theological detail and carried the matter to a higher court.”