The liberal solution to the problem of limiting the powers of a democratic majority employed various devices. The first was the separation of powers—i.e., the distribution of power between such functionally differentiated agencies of government as the legislature, the executive, and the judiciary. This arrangement, and the system of checks and balances by which it was accomplished, received its classic embodiment in the Constitution of the United States and its political justification in the Federalist papers (1787–88), by Alexander Hamilton, James Madison, and John Jay. Of course, such a separation of powers also could have been achieved through a “mixed constitution”—that is, one in which power is shared by, and governing functions appropriately differentiated between, a monarch, a hereditary chamber, and an elected assembly; this was in fact the system of government in Great Britain at the time of the American Revolution. The U.S. Constitution also contains elements of a mixed constitution, such as the division of the legislature into the popularly elected House of Representatives and the “aristocratic” Senate, the members of which originally were chosen by the state governments. But it was despotic kings and functionless aristocrats—more functionless in France than in Britain—who thwarted the interests and ambitions of the middle class, which turned, therefore, to the principle of majoritarianism.

Liberalism, political doctrine that takes protecting and enhancing the freedom of the individual to be the central problem of politics. Liberals typically believe that government is necessary to protect individuals from being harmed by others, but they also recognize that government itself can pose a threat to liberty. As the revolutionary American pamphleteer Thomas Paine expressed it in Common Sense (1776), government is at best “a necessary evil.” Laws, judges, and police are needed to secure the individual’s life and liberty, but their coercive power may also be turned against him. The problem, then, is to devise a system that gives government the power necessary to protect individual liberty but also prevents those who govern from abusing that power.