In the words of those who have passed: 2017, PART I by Egantx7

Question 13

Author, from the 1951 monograph Social Choice and Individual Values:

If we exclude the possibility of interpersonal comparisons of utility, then the only methods of passing from individual tastes to social preferences which will be satisfactory and which will be defined for a wide range of sets of individual orderings are either imposed or dictatorial.

Kenneth Arrow (Arrow's Impossibility Theorem)