Philip Roth, the prize-winning novelist and fearless narrator of sex, death, assimilation and fate, from the comic madness of “Portnoy’s Complaint” to the elegiac lyricism of “American Pastoral,” died Tuesday night at age 85. Author of more than 25 books, Roth was a fierce satirist and uncompromising realist, confronting readers in a bold, direct style that scorned false sentiment or hopes for heavenly reward. He was an atheist who swore allegiance to earthly imagination, whether devising pornographic functions for raw liver or indulging romantic fantasies about Anne Frank. In “The Plot Against America,” published in 2004, he placed his own family under the anti-Semitic reign of President Charles Lindbergh. In 2010, in “Nemesis,” he subjected his native New Jersey to a polio epidemic.