Later thinkers, from Bertrand Russell to Carl Sagan, echoed Einstein’s themes. Russell, co-author of the Russell-Einstein Manifesto (1955, written just before Einstein’s death), extended the argument to include thermonuclear weapons. Sagan’s concept of “nuclear winter” provided scientific grounding for Einstein’s intuition that even a “limited” nuclear war could threaten all of humanity.
The speech highlighted that peace depends on mutual trust and the voluntary renunciation of violence. Later thinkers, from Bertrand Russell to Carl Sagan,
"The release of atomic power has changed everything but our way of thinking," he famously said during this era, "and thus we drift toward unparalleled catastrophe." from Bertrand Russell to Carl Sagan