A Civil Rights campaigner, she was active in many areas, including defending those wrongly accused of crimes. She gave a voice to the oppressed in her magazine.
At the forefront of the Civil Rights movement, she attended the March on Washington before photographing images of racism and the struggle for equality in the USA.
Two years before the Rosa Parks incident, Martha was persecuted on a bus in Baton Rouge. It led to a bus boycott and inspired the Civil Rights Movement.