Marx Brothers made a guest appearance to introduce the "Tonight Show's" new host, Johnny Carson. Around 1960, the acclaimed director Billy Wilder considered writing and directing a new Marx Brothers film. Tentatively titled "A Day at the U.N.", it was to be a comedy of international intrigue set around the United Nations building in New York. Wilder had discussions with Groucho and Gummo, but the project was put on hold because of Harpo's ill-health and abandoned when Chico died in 1961. He was 74. Three years later, on September 28, 1964, Harpo died at the age of 75 of a heart attack
Marx after Sraffa Marx after Sraffa Marx after Sraffa is a 1977 book about Marxist economics by the economist Ian Steedman, in which the author argues against the labor theory of value. Steedman has been criticized for alleged misunderstandings of Karl Marx. The economist Heinz D. Kurz reviewed "Marx after Sraffa" in "Kyklos". The political scientist David McLellan wrote in the 1995 edition of his "" that Steedman's reading of Marx has been influential. The philosopher Roger Scruton wrote that Steedman provides the most notable argument against the labor theory of value from the New Left. The Marxist theorist Ernest Mandel considered "Marx