In 1893, this person wrote an introduction to Das Kapital that agreed with its view of history as a class struggle but disagreed that Communism would bring about a classless society. This person also argued that only ordinal utility was necessary rather than quantitative utility in his Manual of Political Economy. This writer's study of income distri- butions led to the generalization that twenty percent of a population controls eighty percent of its wealth. This person 
In 1893, this person wrote an introduction to Das Kapital that agreed with its view of history as a class struggle but disagreed that Communism would bring about a classless society. This person also argued that only ordinal utility was necessary rather than quantitative utility in his Manual of Political Economy. This writer's study of income distri- butions led to the generalization that twenty percent of a population controls eighty percent of its wealth. This person is most closely associated with situations in which it is impossible to make one person better off without making somebody else worse off. Name this person whose name often precedes the words "optimality" or "efficiency".
In 1893, this person wrote an introduction to Das Kapital that agreed with its view of history as a class struggle but disagreed that Communism would bring about a classless society.
Vilfredo {Pareto}