What is the main idea of roll of thunder hear my cry?

This novel deals directly with the plight of African Americans in the south during the Great Depression. Through the Logan family, we experience the atrocities committed against blacks in the south, and the oppression they faced. We also learn that there were a lot of good people in the world..... not every white farmer, landowner, or business owner was portrayed in a negative manner. Often, these people worked right alongside their neighbors without racial tension.

what is the main idea of Roll of Thunder Hear My Cry by Mildred D.Taylor.

It is about the racism about the people during the Great Depression. It is an awesome book.