“[He] sold more than 600 cartoons and drawings to The New Yorker after William Shawn, the editor at the time, bought the first one in 1981. Like many cartoonists of a nonpolitical stripe, he was something of a sociologist – a student of habits and trends, memes and fashions, the purposes and cross-purposes of human interaction, most of which he exploited for gentle ridicule or defiant amusement.”