What is the most popular religion on earth?

One of the most important rules in Thelema simply states "Do what thou wilt, shall be the whole of the law." and also there is a strong emphasize and focus on individualism in Thelema. Aleister Crowley himself also encouraged (usually indirectly) followers to refuse dogma's and things that may appear as collectivism. Therefore, many ideas prevailent in Thelema could be more or less described as anarchist.