In "Collected Papers 21" Bertrand Russell grapples with the dilemma that confronted all opponents of militarism and war in the 1930s - namely, what was the most politically and morally appropriate response to international aggression. "How to Keep the Peace" contains some of Russell's best-known essays, such as the famous "Auto-obituary" and his treatment of "The Superior Virtue of the Oppressed". Like the sixteen previous volumes in Routledge's critical edition of Russell's shorter writings, however, "Collected Papers 21" also includes a number of unpublished manuscripts from the Bertrand Russell Archives at McMaster University. Moreover, it recovers for Russell scholars and general readers alike a rich vein of material that has previously appeared in print only in obscure or long-defunct newspaper and periodical publications.