Drucker went to California in 1971, where he developed one of the country's first executive MBA programs for working professionals at Claremont Graduate University (then known as Claremont Graduate School). From 1971 until his death, he was the Clarke Professor of Social Science and Management at Claremont. Claremont Graduate University's management school was named the Peter F. Drucker Graduate School of Management in his honor in 1987 (later renamed the Peter F. Drucker and Masatoshi Ito Graduate School of Management). He established the Drucker Archives at Claremont Graduate University in 1999; the Archives became the Drucker Institute in 2006. Drucker taught his last class in 2002 at age 92. He continued to act as a consultant to businesses and nonprofit organizations well into his nineties.