Answer: MARX
MARX is a crossword puzzle answer that we have spotted 104 times.
Referring Clues:
- Zeppo, for one
 - "Manifesto" writer
 - Orally grades comedic brother (4)
 - Out-of-favor icon
 - Manifesto writer
 - Philosopher who gave his name to an -ism
 - Karl who philosophized about class struggle
 - With 53-Across, noted comedy group, in brief
 - Last name in comedy
 - Harpo or Karl
 - Any of the brothers in "Horse Feathers"
 - Gummo or Groucho
 - Harpo, e.g.
 - Karl or Harpo
 - Surname in zany comedy
 - Engels collaborator
 - Revolutionary expelled from Prussia in 1849
 - Karl or Chico
 - Name of brothers in movies found at 20-, 28-, 48-, and 56-Across
 - Zeppo or Chico
 - Surname of comedic brothers
 - Comedy's __ Brothers
 - Chico, Groucho, Gummo, Harpo, or Zeppo of comedy
 - Family name in comedy
 - "Go West" name
 - Gummo, for one
 - "Duck Soup" name
 - Proponent of a classless society
 - 1950s-'60s TV quiz show host
 - "Time flies like an arrow. Fruit flies like a banana" speaker
 - "Das Kapital" author
 - ''Duck Soup'' surname
 - ''Animal Crackers'' surname
 - Noted critic of capitalism
 - ''You Bet Your Life'' host
 - Karl of communism
 - Memorable brothers
 - Any brother in "Animal Crackers"
 - Comedic actor Groucho
 - German political theorist
 - Any of five O-ending brothers
 - "The Poverty of Philosophy" author
 - Karl with a manifesto
 - "You Bet Your Life" host
 - Comedy's ___ Brothers
 - "Right Here Waiting" rocker Richard
 - "Duck Soup" surname
 - "Animal Crackers" surname
 - Harpo or Chico
 - "The Big Store" name
 - Big critic of capitalism
 - Noted communist buried in Highgate Cemetery
 - Noted communist buried in Highgate Cemetery
 - 'You Bet Your Life' host
 - Collaborator with Engels
 - 'Das Kapital' author
 - 'You Bet Your Life' emcee
 - 'Animal Crackers' surname
 - Fraternal surname of comedy
 - Chico or Harpo
 - German socialist Karl
 - Chico or Karl
 - Prussian-born philosopher
 - Groucho or Chico
 - "Those are my principles. If you don't like them I have others" speaker
 - "The rich will do anything for the poor but get off their backs" theorist
 - "Dictatorship of the proletariat" philosopher
 - "I have had a perfectly wonderful evening, but this wasn't it" speaker
 - "Animal Crackers" brothers
 - Surname of four "Duck Soup" stars
 - Richard with the 1989 #1 hit "Right Here Waiting"
 - Surname of four stars in "Duck Soup"
 - "Horse Feathers" family name
 - Karl, Richard or Harpo
 - "The Communist Manifesto" coauthor
 - Brothers seen in "Duck Soup"
 - Harpo, Zeppo or Groucho
 - Harpo, for one
 - Groucho's surname
 - Who said history repeats itself "the first time as tragedy, the second time as farce"
 - See 76-Down
 - Funny Groucho or Harpo
 - Who said "Revolutions are the locomotives of history"
 - Big name in economics history
 - Surname of four "Animal Crackers" actors
 - Who said religion "is the opium of the people"
 - "Capital" fellow
 - Gummo or Zeppo
 - See 10-Down
 - Any of the "Animal Crackers" brothers
 - See 38-Down
 - Influence on Castro and Mao
 - Surname of the stars of 20-, 37- and 53-Across
 - Communist icon
 - Manifesto man
 - German social-science pioneer
 - Chico was the first-born one
 - Groucho or Harpo
 - His tombstone reads "Workers of all lands unite"
 - Karl who co-wrote a manifesto
 - Classic comedy's ___ Brothers
 - Brothers known for "Duck Soup" and "Animal Crackers"
 - "Right Here Waiting" singer Richard
 - Philosopher who wrote "The bureaucracy is a circle from which no one can escape"
 
Last Seen In:
- New York Times - July 06, 2025
 - LA Times - August 06, 2024
 - LA Times - April 20, 2023
 - Universal - March 16, 2021
 - New York Times - October 26, 2020
 - New York Times - August 02, 2020
 - Netword - March 15, 2020
 - Universal - January 30, 2020
 - LA Times - December 28, 2019
 - Netword - September 06, 2019
 - Universal - July 24, 2019
 - LA Times - April 25, 2019
 - LA Times - March 27, 2019
 - Universal - March 01, 2019
 - New York Times - January 20, 2019
 - LA Times - January 10, 2019
 - USA Today - January 04, 2019
 - New York Times - October 03, 2018
 - Universal - August 15, 2018
 - New York Times - July 24, 2018
 
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