The very beginnings of the SCLC can be traced back to the Montgomery Bus Boycott, whicy began on December 5, 1955 after Rosa Parks was arrested for refusing to give up her seat to a White man on the bus. The boycott lasted for 381 days and ended on December 21, 1956, with the desegregation of the Montgomery bus system. The boycott was carried out by the newly established Montgomery Improvement Association (MIA). Martin Luther King, Jr. served as president and Ralph David Abernathy served as program director.