It was naughty of Winston Churchill to say, if he really did, that "the best argument against democracy is a five-minute conversation with the average voter."

Nevertheless, many voters' paucity of information about politics and government, although arguably rational, raises awkward questions about concepts central to democratic theory, including consent, representation, public opinion, electoral mandates and officials' accountability.

In "Democracy and Political Ignorance: Why Smaller Government is Smarter" (Stanford University Press), Ilya Somin of George Mason University Law School argues that an individual's ignorance of public affairs is rational because the likelihood of his or her vote being decisive in an election is vanishingly small. The small incentives to become informed include reducing one's susceptibility to deceptions, misinformation and propaganda. And if remaining ignorant is rational individual behavior, it has likely destructive collective outcomes.