Answer: marx

AnswerCrossword Clue
MARXSurname of four stars in "Duck Soup"
MARXKarl or Chico
MARXRevolutionary expelled from Prussia in 1849
MARXZeppo or Chico
MARXZeppo, for one
MARXSurname of comedic brothers
MARXBig critic of capitalism
MARXNoted communist buried in Highgate Cemetery
MARX"Dictatorship of the proletariat" philosopher
MARX"Duck Soup" name
MARXSurname of four "Duck Soup" stars
MARXSurname in zany comedy
MARX"Duck Soup" surname
MARX"The Communist Manifesto" coauthor
MARXBrothers seen in "Duck Soup"
MARXChico or Karl
MARXGummo, for one
MARXDas Kapital author Karl
MARX"Horse Feathers" family name
MARXHarpo or Chico
MARXInfluence on Castro and Mao
MARX"Time flies like an arrow. Fruit flies like a banana" speaker
MARXDas Kapital author
MARXInfluence on Lenin
MARX"You Bet Your Life" host
MARX"Horse Feathers" surname
MARX"The history of all previous societies has been the history of class struggles" espouser
MARXHis epitaph begins "Workers of all lands unite"
MARXWriter on class struggle
MARXEngels collaborator
MARX"Das Kapital" author
MARXBrothers with whom Margaret Dumont often appeared
MARX1950s-'60s TV quiz show host
MARXComedy's .. Brothers
MARXAny of five O-ending brothers
MARX"Those are my principles. If you don't like them I have others" speaker
MARXAny of the brothers in "Horse Feathers"
MARXHarpo or Karl
MARXGummo or Groucho
MARXHarpo, e.g.