Complex sentence: He served in the United States Marine Corps from 1956 to 1959 and graduated from Michigan State University in 1963 with a degree in economics, has received several honorary PhD's, and remains an ardent supporter of the university.
Split into simpler sentences: He served in the United States Marine Corps from 1956 to 1959 and graduated from Michigan State University in 1963 with a degree in economics. He has received several honorary PhD's, and remains an ardent supporter of the university.