Back to Methuselah, by Bernard Shaw, is a play where the author expresses his reflections on the topic of religion and atheism, science, politics, and history. The preface of the book deals with popular thoughts, institutions, and most sacred beliefs. Shaw gives a history of the different beliefs towards the nature of a human and the universe. He goes on with his own mental struggles and evolution. Shaw criticizes the church and its followers, whom he calls idolaters. He says that their superstitions and legends actually deter people from the divine. But he criticizes atheism too and reflects on how the atheists manipulate the Darwin teachings of evolution.