Two U.S. states still honor Confederate Gen. Robert E. Lee on the federal holiday set aside for Civil Rights leader Martin Luther King Jr. Will that change?

Martin Luther King Jr., a reverend and civil-rights activist, was assassinated at 39. However, he inspired several movements and political changes.

Rev, Martin Luther King Jr. wrote while incarcerated in Birmingham, Alabama: “Injustice anywhere is a threat to justice everywhere.” MLK’s eloquent, 7,000-word letter — which was written to Alabama clergymen who were against his nonviolent Civil Rights protests during that time — called readers to take “direct action” against unjust laws and urged clergymen to better visualize the corner Black people were being forced into.