Bachelor in Philosophy magna cum laude, Yale University, 1971; Doctor of Philosophy, Northwestern University, 1976.
Visiting lecturer philosophy, Hastings (Nebraska) College, 1976; from assistant professor to associate professor philosophy, Central College, Pella, Iowa., since 1976.
Member American Philosophical Association.
Married Rosalva Perez-Lopez, February 15, 1975 (divorced 1990). Children: Ian Daniel, Alan Derek. Married Jacqueline Diann Vandenoever, June 5, 1994.