Martin Luther King Jr. was an advocate of non-violent social change strategies, who fought to abolish racial prejudices. He served as the president of the Montgomery Improvement Association (MIA) and as a result of lawsuits created by MIA, U.S. Supreme Court ruled that Alabama's state and local segregation laws are unconstitutional. In 1957, King found the Southern Christian Leadership Conference (SCLC), which is defined by its commitment to nonviolence, non-cooperation with unjust laws. He was jailed many a times for his protests but he did not stop fighting for peace. Finally in 1964 King attended the signing of the Civil Rights Act if 1964 with President Lyndon Johnson and received the Nobel Peace Prize. Martin Luther King Jr. was assassinated at the Lorraine Hotel in Memphis