Jimmy Carter , the thirty-ninth president of the United States , left office in 1981 , and became Professor of Emory University in Atlanta,Georgia, and founded the Carter Center. The aim of the Carter Center was to resolve conflict , promote democracy, protect human rights and prevent disease and other problems. Jimmy and Rosalynn Carter volunteer one wet a year for Habitat for Humanity, an organization that helps needy people in the United States and in other countries. He was awarded the Nobel Prize for Peace in 2002.