Egoism
The American researcher James Scanlan says that when people do whatever benefits themselves it is only a fake kind of egoism. And that real egoism is when people do whatever they want. Both are often seen as dangerous beliefs. Some egoists such as Max Stirner, Nikolay Chernyshevsky, and Dmitry Pisarev, are also thought of as nihilists. And Aleister Crowley was a British egoist who made the phrase "Do what thou will" popular.