Rosa Parks is known for refusing to give up her seat to a white man on a bus in Montgomery, Alabama in 1955. That refusal was a spark for the civil rights movement in the US.
Standing up for what was fair and just was not new to Parks. She joined the NAACP in 1943 and worked on criminal justice issues as a sexual assault investigator. She investigated claims of rape against black men by white women--working to protect black men from false accusations of rape. She was also committed to making sure that black people who were sexually assaulted by white people could seek justice. The Rape of Recy Tayloris a film that chronicles one of the cases that Rosa Parks brought to national attention.