The prominent figure advocating for racial equality after the conversion to Christianity was Martin Luther King Jr. He became a leading voice in the American civil rights movement during the 1950s and 1960s, advocating for nonviolent protest against racial segregation and injustice. King's Christian faith infused his activism, emphasizing love, forgiveness, and social justice. His famous "I Have a Dream" speech articulated a vision of a racially integrated and harmonious America, focusing on the moral imperative of equality. King's leadership and deep commitment to Christian principles galvanized support across the nation and inspired future generations in the quest for civil rights.