By Paul Grein The R-rated movie has been a moviegoing constant since 1968, when the Motion Picture Association of ... highest-grossing R-rated films of all time, according to boxofficemojo.com.

But where Taxi Driver—and Joker’s other obvious Scorsese influence, The King of Comedy—indict the cultural impulses that drive such violence and fetishize its perpetrators, Joker can’t ...