Past attempts to abolish nuclear weapons / Joseph Rotblat - - Nuclear weapons after the Cold War / Carl Kaysen, Robert McNamara, and George Rathjens - - A nuclear-weapon-free world : is it desirable? is it necessary? / Jack Steinberger, Essam Galal, and Mikhail Milstein - - Technological problems of verification / Theodore Taylor - - The breakout problem / Marvin Miller and Jack Ruina -- Societal verification / Joseph Rotblat - - A NWFW regime : treaty for the abolition of nuclear weapons / Maxwell Bruce, Horst Fischer, and Thomas Mensah - - Verification and enforcement in a NWFW / James Leonard, Martin Kaplan, and Benjamin Sanders - - International security in a NWFW / Shalheveth Freier - - Making nuclear weapons illegal / Jozef Goldblat. Nuclear weapons for the United Nations? / Richard Garwin - - An international nuclear security force / Vitalii Goldanskii and Stanislav Rodionov - - An asymptotic approach to a NWFW / Francesco Calogero - - Approaches towards a nuclear-weapon-free world / Bhalchandra Udgaonkar, Raja Mohan, and Maj Britt Theorin.