Szilard’s biographer, William Lanouette, wrote that the Pugwash meeting was “the international forum that finally coupled Szilard’s eclectic brainstorming with his fervent desire to curb the U.S.-Soviet arms race”. Quoting Lanouette again, "…the Russians quickly warmed to Szilard’s candor and wit. ‘They really loved Leo,’ recalled Ruth Adams, an editor at the Bulletin who attended the First Pugwash Conference and many to follow. ‘He never tried to disguise anything, and they appreciated that.’"
William Lanouette with Bela Silard, Genius in the Shadows. 587 pages, Scribner's, New York, 1992, ISBN 0-684-19011-7. For a review, see: David Hafemeister, American Journal of Physics, Sept 1993 (reprinted Physics and Society Newsletter, Jan 1994.)