The reason that the Constitution calls for this extra layer, rather than just providing for the direct election of the president, is that most of the nation’s founders were actually rather afraid of democracy. James Madison worried about what he called “factions,” which he defined as groups of citizens who have a common interest in some proposal that would either violate the rights of other citizens or would harm the nation as a whole. Madison’s fear – which Alexis de Tocqueville later dubbed “the tyranny of the majority” – was that a faction could grow to encompass more than 50 percent of the population, at which point it could “sacrifice to its ruling passion or interest both the public good and the rights of other citizens.”
