The movement that opposed the use of nuclear weapons during the Cold War was known as the nuclear disarmament movement. It gained momentum in the 1950s and 1960s, driven by widespread public fear of nuclear war after events like the bombings of Hiroshima and Nagasaki. Activists, including scientists, peace organizations, and ordinary citizens, campaigned for nuclear disarmament through protests, petitions, and advocacy for treaties that limited nuclear weapons testing and proliferation. The movement played a significant role in raising awareness about the dangers of nuclear arms and contributed to various arms control agreements like the Non-Proliferation Treaty (NPT).