The determination of “who is a J” within a society is treated as an aggregation of the views of the members of the society regarding this question. Methods, similar to those used in Social Choice theory are applied to axiomatize three criteria for determining who is a J: 1) a J is whoever defines oneself to be a J. 2) a J is whoever a “dictator” determines is a J. 3) a J is whoever an “oligarchy” of individuals agrees is (...) a J. (shrink)