Why did Rome became a republic?

Rome became a republic in 509 BCE after a period of political turmoil and conflict between the wealthy patricians and the common people or plebeians. The last Etruscan king, Tarquin the Proud, was overthrown and the people demanded that power be shared among different groups. The Roman Republic was established as a system of government in which power was divided among two consuls, a senate, and the popular assemblies. The republic allowed for more participation and representation of the people in government, and it also created a balance of power and checks and balances that prevented any one group from gaining too much power.