What did the us civil rights movement gain new momentum after world 2

Because, the booming economy had created a larger black middle class.

Martin Luther King, Jr. founded the Southern Christian Leadership Conference. This was the time of great turmoil when blacks were segregated from the whites by certain laws. These laws gave numerous privileges to the white people and increased the suffering of the black people. Numerous blacks also migrated from the colonies to the US that put fuel into fire.