During this time (= In Paris) I finished my book on Russia, and decided, after much hesitation, that I would publish it. To say anything against Bolshevism was, of course, to play into the hands of reaction, and most of my friends took the view that one ought not to say what one thought about Russia unless what one thought was favourable. I had, however, been impervious to similar arguments from patriots during the War, and it seemed to me that in the long run no good purpose would be served by holding one's tongue
Source: The Autobiography of Bertrand Russell, v.2 chap. ３: China, 1968
More info.:http://russell-j.com/beginner/AB23-010.HTM