It is said that there are now in existence forty thousand tons of uranium, enough to produce bombs of the kind used at Hiroshima and Nagasaki.

: He famously noted that the armament race between the U.S. and the U.S.S.R. was assuming a "hysterical character," leading toward the development of the H-bomb and potential "annihilation of any life on earth".

: By 1947, the emerging arms race between the U.S. and the Soviet Union made the threat of "universal destruction" feel inevitable unless radical changes were made. Core Themes and Key Arguments