Postconventional thinking The African National Congress rallies supporters for its Campaign of Defiance Against Unjust Laws. The campaign illustrates moral thinking at a postconventional level. In the 1950s, thousands began protesting against laws that oppressed Black South Africans. The protestors moved beyond the “law and order” orientation of conventional thinking to a higher level of moral reasoning that centered on universal principles of human rights. The campaign strengthened the African National Congress, which became South Africa’s governing political party after the elimination of South Africa’s apartheid system in the early 1990s (www.anc.org.za ).