The civil rights figure who famously said, "Injustice anywhere is a threat to justice everywhere" is Martin Luther King Jr.. This profound statement reflects King's commitment to social justice and his belief in the interconnectedness of human rights struggles across the globe. As a leader in the American civil rights movement during the 1950s and 1960s, he advocated for nonviolent protest against racial segregation and inequality. King's legacy includes his pivotal role in events such as the Montgomery Bus Boycott and the March on Washington, where he delivered the iconic "I Have a Dream" speech.