For 10 points, name this Italian social scientist whose namesake optimality occurs when the welfare of one individual cannot be improved without reducing the welfare of another.
This man stated that the vestiges of sentiments can be observed in residues in his theory of nonrational motivation, and he stated that upper classes in society hold non-rational authority over the lower classes by using rationalizing derivations. The formulator of the theory of the circulation of the elites, this author of Mind and Society introduced the use of indifference curves. For 10 points, name this Italian social scientist whose namesake optimality occurs when the welfare of one individual cannot be improved without reducing the welfare of another.
This man stated that the vestiges of sentiments can be observed in residues in his theory of nonrational motivation, and he stated that upper classes in society hold non-rational authority over the lower classes by using rationalizing derivations.
Vilfredo {Pareto}