Science background (MIT), but completed degrees in history (Univ. Pa, Trinity College, Saarland University, with PhD from Michigan State University), with specialty in early European Medieval History, although most work done in world history and philosophy of history. Call sign: KB1GRM; qualified on submarines (ET1-SS); philatelist (Das befriete Gebeit Südchina: Briefmarkenkatalog und Postalgeschichte (Essen, 1981).