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in Routledge's critical edition of Russell's shorter writings, however, Collected Papers 21 also includes a number of unpublished manuscripts from the Bertrand Russell Archives at McMaster University.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.