It would be much safer, Plato thought, to entrust power to carefully educated guardians. To keep their minds pure of distractions—such as family, money, and the inherent pleasures of naughtiness—he proposed housing them in a eugenically supervised free-love compound where they could be taught to fear the touch of gold and prevented from reading any literature in which the characters have speaking parts, which might lead them to forget themselves. The scheme was so byzantine and cockamamie that many suspect Plato couldn’t have been serious; Hobbes, for one, called the idea “useless.”
A more practical suggestion came from J. S. Mill, in the nineteenth century: give extra votes to citizens with university degrees or intellectually demanding jobs. (In fact, in Mill’s day, select universities had had their own constituencies for centuries, allowing someone with a degree from, say, Oxford to vote both in his university constituency and wherever he lived. The system wasn’t abolished until 1950.) Mill’s larger project—at a time when no more than nine per cent of British adults could vote—was for the franchise to expand and to include women. But he worried that new voters would lack knowledge and judgment, and fixed on supplementary votes as a defense against ignorance.