Civil rights pioneer Claudette Colvin has died. She was 86. Her 1955 arrest for refusing to give up her seat on a segregated Montgomery bus helped spark the modern civil rights movement. Her death was announced Tuesday by the Claudette Colvin Legacy Foundation. The organization said she died of natural causes in Texas. Colvin was arrested months before Rosa Parks gained international fame before refusing to give up her seat on a segregated bus. Colvin became a named plaintiff in the landmark lawsuit that outlawed racial segregation on Montgomery’s buses.