The Religion of Duty is a philosophical book written by Felix Adler, the founder of the Ethical Culture movement. It was originally published in 1905 and has since been reprinted numerous times. In this book, Adler argues that morality is not based on divine revelation or on the pursuit of happiness, but rather on the duty to do what is right. He believes that individuals have a responsibility to act in a way that promotes the well-being of society...