In what way are Paul Robeson, Sonia Sotomayor, Richard Aoki, and Wilma Mankiller alike?

Paul Robeson, Sonia Sotomayor, Richard Aoki, and Wilma Mankiller are all significant non-white Americans.

Paul Robeson was a black man, musician, actor, lawyer educated in Rutgers college and a civil rights activist.

Sonia Sotomayor is a judge in the U. S. Supreme court, of Puerto-rican parents, educated in Princeton and Yale.

Richard Aoki was a college counselor educated in the University of California, born to Japanese parents, civil rights activist and an early member to the Black Panther party.

Wilma Mankiller was the first elected woman to serve as the Principal Chief of the Cherokee Nation, and an activist of the Native American rights.