G.A. Cohen, who retired last year from Oxford, died on August 5. Although he was a Marxist, he took libertarian ideas with great seriousness; and his efforts to come to grips with the self-ownership principle merit careful study. I rate him one of the best philosophers of the past fifty years. He was extraordinarily sharp in argument but, at least judged by the few times I was in touch with him, warm and generous. He was also extremely funny. I will miss Jerry Cohen.