 This “expressive theory of voting” is untroubled by and indeed partly supported by the empirical findings that most voters are ignorant about basic political facts (Somin 2013; Delli Carpini and Keeter, 1996). The expressive theory is also untroubled by and indeed partly supported by work in political psychology showing that most citizens suffer from significant “intergroup bias”: we tend to automatically form groups, and to be irrationally loyal to and forgiving of our own group while irrationally hateful of other groups (Lodge and Taber 2013; Haidt 2012; Westen, Blagov, Harenski, Kilts, and Hamann 2006; Westen 2008). Voters might adopt ideologies in order to signal to themselves and others that they are certain kinds of people. For example, suppose Bob wants to express that he is a patriot and a tough guy. He thus endorses hawkish military actions, e.g., that the United States nuke Russia for interfering with Ukraine. It would be disastrous for Bob were the US to do what he wants. However, since Bob’s individual vote for a militaristic candidate has little hope of being decisive, Bob can afford to indulge irrational and misinformed beliefs about public policy and express those beliefs at the polls.