Under Article II of the Constitution, the President is responsible for the execution and enforcement of the laws created by Congress. ... The Executive Branch conducts diplomacy with other nations, and the President has the power to negotiate and sign treaties, which also must be ratified by two-thirds of the Senate.
The US government and the Roman Republic both have the Executive and Legislative Branches in their government. The Roman Republic and US Government both have a set of checks and balances.
A Juxtaposition of God and the Human Brain
King James I granted the Virgina Company a royal charter for the colonial pursuit in 1606.
During the 1848 Springtime of Peoples, revolutionaries in the Italian states established "republics", since they were democratic in nature, although they soon fell to tyrannical rule.