Cartoonist-and-so-much-more Art Spiegelman is leaving The New Yorker, as he has several times before, citing differences with the direction the venerable magazine has taken since 9/11. Spiegelman, who has never hesitated to express unpopular ideas in his work, praises editor David Remnick, but says that “the place I’m coming from is just much more agitated than The New Yorker’s tone. The assumptions and attitudes [I have] are not part of The Times Op-Ed page of acceptable discourse.”