Why did the us civil rights movement gain new momentum after ww2

At the end of the Second World War, civil rights movements developed because the economy was booming, which allowed the development of the middle class and the education of all people, including African-Americans.

Explanation:

After World War II, in the 50s and 60s, important nonviolent campaigns were lived in different parts of the world, such as the campaigns for the civil rights of African Americans carried out by Martin Luther King in the United States or by of improvement of working conditions of Latinos by Chicano Cesar Chávez in the same country, or by social improvements by Danilo Dolci in Sicily or Saul Alinsky in the United States, or Adolfo Pérez Esquivel's nonviolent liberation theory in Latin America, the failed campaign against Tamil discrimination of Chelvanayakam in the then called Ceylon and now Sri Lanka, or for the independence of Zambia by Kenneth Kaunda and that of Ghana by Kwane Nkrumah.

what the first or next guy says

during both period congress passed law restricting the civil liberties of american citizen that meet with the overall public support is the one statement that explain the rate scare of the 1920 and 1950 is very similar