Why do you think the Civil Rights Act of 1964 did not passed earlier in the 1950s

In the 1950s the world was focused on other things. It was a post-war period in which two superpowers like the USA and the Soviet Union were disputing the supremacy of the world in what was called the cold war. In 1950 the Korean war started. The problem of Civil Rights was latent but international conflicts and the cold war distracted somehow the agenda of leaders and people.