If anything, Asimov's social life improved in New York. He soon was seeing his editors more regularly than ever and, in addition, his old science-fiction friends, Lester del Rey, Judy-Lynn Benjamin (who became Mrs. del Rey), Robert Silverberg, and others, including John Campbell, until his untimely death, on July 11, 1971 of a ruptured aorta, at the age of 61. And Asimov attended various local science-fiction conventions. At one of them on January 23, 1971, Robert Silverberg and Lester del Rey participated in a dialogue about ''the ins and outs of science fiction." At one point Silverberg illustrated the greater importance of the human aspects of a science-fiction story over the scientific detail by asking why anyone should be overly concerned with some trivial matter concerning, say, plutonium-186.