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
Karl Marx and the Close of His System Karl Marx and the Close of His System Karl Marx and the Close of His System () is a critique of Karl Marx's economic theories by the Austrian economist Eugen Böhm von Bawerk, published in English translation in 1898. Böhm von Bawerk's work first appeared in 1896, in "Staatswissenschaftliche Arbeitern: Festgaben für Karl Knies", a collection of essays in honor of the German economist Karl Knies. It was published as a separate work later in 1896, and appeared in Russian translation in 1897 and in English translation in 1898. Bawerk provides a critique of Marx's "Capital". Examining Marx's theory of