October 24, 1935 Langston Hughes’s first play, “Mulatto,” opened on Broadway. It was the longest-running play (373 performances) by an African-American until Lorraine Hansberry’s “A Raisin in the Sun” which premiered in 1959. Langston Hughes First-rate bio of Langston Hughes

October 24, 1940 The 40-hour workweek went into effect under the Fair Labor Standards Act of 1938, requiring employers to pay overtime and restricting the use of child labor. Decades of labor agitation and a considerable number of lives made this change possible. More on The Fair Labor Standards Act of 1938:

October 24, 1945 The United Nations World Security Organization came into being when the Soviet Union (Union of Soviet Socialist Republics or USSR) in mid-afternoon deposited its instrument of ratification of the U.N. Charter. The USSR became the last of the five major powers and the 29th of 51 nations, the minimum necessary to bring this about. James F. Byrnes, U.S. Secretary of State, then signed the protocol formally attesting that the Charter of the United Nations had come into force.This is now considered United Nations Day. Read more  (no paywall.)

October 24, 1970 Salvador Allende Gossens, an avowed Marxist and head of the Unidad Popular Party, became the president of Chile after being elected and confirmed by the Chilean Congress.For the next three years, the United States exerted tremendous pressure to destabilize and unseat the Allende government. In 1958, and again in 1964, Allende had run on a socialist /communist platform. In both elections, the United States government (as well as U.S. businesses such as International Telephone and Telegraph (ITT), which had significant investments in Chile) worked to defeat Allende by sending millions of dollars of assistance to his political opponents. Allende and supporters More on Allende

October 24, 1981 More than 250,000 people, organized by the Committee for Nuclear Disarmament (CND), marched through London to protest the siting of American nuclear missiles in the United Kingdom. More background and video

https://www.peacebuttons.info/E-News/peacehistoryoctober.htm#october24