What was Martin Luther King, Jr. known for?

Martin Luther King, Jr. is best known for his pivotal role in the civil rights movement during the 1950s and 1960s. He advocated for equality and justice for African Americans, using nonviolent protest and civil disobedience to challenge racial segregation and discrimination in the United States. His leadership in major events, such as the Montgomery Bus Boycott and the March on Washington, helped to raise awareness and support for civil rights. King's famous "I Have a Dream" speech, delivered during the March on Washington in 1963, is one of the most iconic moments in the struggle for civil rights, emphasizing his vision for a society free from racial injustice.

While other social causes were significant, such as women's rights, labor rights, and environmental issues, King's legacy is firmly rooted in the fight for civil rights, making that choice the most accurate.