Zeppo Marx was from East Frisia in Germany; and his father was a native of France, and worked as a tailor. As with all of the Marx Brothers, there are different theories as to where Zeppo got his stage name: Groucho said in his Carnegie Hall concert in 1972 that the name was derived from the Zeppelin airship. Zeppo's ex-wife Barbara Sinatra repeated this in her 2011 book, "Lady Blue Eyes: My Life with Frank". His brother Harpo offered a different account in his 1961 autobiography, "Harpo Speaks!," claiming (p. 130) that there was a popular trained chimpanzee named Mr. Zippo, and
The Formation of the Economic Thought of Karl Marx The Formation of the Economic Thought of Karl Marx The Formation of the Economic Thought of Karl Marx: 1843 to Capital () is a 1967 book by the Marxist theorist Ernest Mandel, in which the author discusses the economic theories of Karl Marx. It appeared in English translation in 1971. "The Formation of the Economic Thought of Karl Marx" received a positive review in "Telos" from James E. Hansen when the work was published in English in 1971. Hansen welcomed Mandel's book as important contribution to scholarship on Marx. The political scientist David McLellan called Mandel's work "excellent" in the