Humanities and the Purpose of Voting

Someone perplexed by someone's voting against their best self-interest is likely unfamiliar with the distinction, drawn by Aristotle and Spinoza, among others, between believing what is good for oneself, and knowing what is good for oneself.  The perplexity furthermore reflects an unfamiliarity with Rousseau's concept of the General Good as the object of a vote, not personal Self-Interest, whether or not adequately conceived.  The current widespread unfamiliarity with this complexity of the topic of the purpose of voting would be remedied in a Humanities education that aims to empower the citizens of a Democracy, rather than serves as a means to increasing their value on the job market.