One of the few personalities known for his disdain of self-promotion, Thomas Sowell is an important American social theorist and economist. Over the years, he has played a prominent role working as a faculty member of many prestigious universities, such as the University of California, Los Angeles (UCLA) and Cornell University.
W. E. B. Du Bois was an American civil rights activist, sociologist, and Pan-Africanist. Du Bois played an instrumental role in fighting for full civil rights for people of color around the world. A co-founder of the National Association for the Advancement of Colored People, Du Bois also played an important role as the leader of the Niagara Movement.