The founders of the United States drew inspiration from five main sources when establishing the government: Ancient Greece, Ancient Rome, England, John Locke, and Baron de Montesquieu. Ancient Greece influenced the idea of direct democracy. Rome established the republic. England influenced the separation of powers and rights through documents like the Magna Carta. John Locke's ideas of natural rights to life, liberty, and property were important. Montesquieu advocated for separation of powers among the legislative, executive, and judicial branches.