The Roman Republic (Latin: Res Pvblica Romana) was the period of the ancient Roman civilization when the government operated as a republic.It began with the overthrow of the Roman monarchy, traditionally dated around 509 BC, and its replacement by a government headed by two consuls, elected annually by the citizens and advised by a senate. A complex constitution gradually developed, centered on the principles of a separation of powers and checks and balances. Except in times of dire national emergency, public offices were limited to one year, so that, in theory at least, no single individual wielded absolute power over his fellow citizens
Roman society was hierarchical.The evolution of the Constitution of the Roman Republic was heavily influenced by the struggle between the patricians, Rome's land-holding aristocracy, who traced their ancestry back to the early history of the Roman kingdom, and the plebeians, the far more numerous citizen-commoners. Over time, the laws that gave patricians exclusive rights to Rome's highest offices were repealed or weakened, and leading plebeian families became full members of the aristocracy. The leaders of the Republic developed a strong tradition and morality requiring public service and patronage in peace and war, making military and political success inextricably linked.