"One who believes as I do, that free intellect is the chief engine of human progress, cannot but be fundamentally opposed to Bolshevism as much as to the Church of Rome. The hopes which inspire communism are, in the main, as admirable as those instilled by the Sermon on the Mount, but they are held as fanatically and are as likely to do as much harm."
Bertrand Russel, The Practice and Theory of Bolshevism (1920)
"One strength of the communist system of the East is that it has some of the character of a religion and inspires the emotions of a religion. Unless the concept of peace based on law gathers behind it the force and zeal of a religion, it can hardly hope to succeed."
Albert Einstein, "Atomic War or Peace" part II (1947)