How was Theodore Schultz awarded the Noble Prize in Economics?

Name: Theodore Schultz.
Real Name: Theodore William Schultz.
Country: United States.
Date of Birth: April 30, 1902.
Died: February 26, 1998.
Education: Graduated from South Dakota State University, and Doctor of Philosophy (Ph.D.) from University of Wisconsin-Madison.
Subjects Of Study: Economic development and human capital.
Noble Prize Year: Nobel Prize for Peace in 1979, for their pioneering research into economic development research with particular consideration of the problems of developing countries.