==Personal life==He married Philippa Jubber in 1963 and divorced in 1980.
Ima častne doktorate na univerzah: The American University of Paris, the University of Adelaide, La Trobe University, the University of Natal, the University of Oxford, Rhodes University, the State University of New York at Buffalo,the University of Strathclyde, the University of Technology, Sydney in na the Adam Mickiewicz University in Poznań.