Egoism
Egoism is often seen as the opposite of altruism, meaning the concern for others. "Altruism" is a word invented by a French thinker named Auguste Comte. He said that people should only serve each other and never be egoistic. But the German thinker Friedrich Nietzsche says that altruism is not the opposite of egoism. He says that even though people  altruism is good, they do not treat each other well very much at all. Many egoists also defend against people getting judged just for doing what benefits themselves. But Nietzsche says that people should eventually leave both altruism and egoism behind.