Government, as explained by Adam Smith had only three functions: protection against foreign invaders, protection of citizens from wrongs committed against them by other citizens, and building and maintaining public institutions and public works that the private sector could not profitably provide. Classical liberals extended protection of the country to protection of overseas markets through armed intervention. Protection of individuals against wrongs normally meant protection of private property and enforcement of contracts, and the suppression of trade unions and the Chartist movement. Public works included a stable currency, standard weights and measures and support of roads, canals, harbors, railways, and postal and other communications services.
Classical liberalism places a particular emphasis on the sovereignty of the individual, with private property rights being seen as essential to individual liberty. This forms the philosophical basis for laissez-faire public policy. The ideology of the original classical liberals argued against direct democracy "for there is nothing in the bare idea of majority rule to show that majorities will always respect the rights of property or maintain rule of law." For example, James Madison argued for a constitutional republic with protections for individual liberty, over a pure democracy, reasoning that in a pure democracy, a "common passion or interest will, in almost every case, be felt by a majority of the whole...and there is nothing to check the inducements to sacrifice the weaker party...."