What was the real reason the civil rights movement was formed by black people?

Political scientists say that social movements like this
happen when you have a few things:

• A sense of
  "relative deprivation."  A group of people has to feel like they have fewer rights (for
  example) than they think they should and can have.  Various
  things (like WWII, the Cold War, and the Brown decision) made blacks feel like they
  could get more rights.


• A good leader.  This would be,
  most notably, Martin Luther King, Jr.


• A somewhat
  supportive environment.  In this case, it means that whites in the North (especially)
  had to be relatively willing to support black
  demands.

Because these conditions were present,
the Civil Rights Movement was able to being at the time that it
did.