Answer:Federalist No. 51 addresses means by which appropriate checks and balances can be created in government and also advocates a separation of powers within the national government. This idea of checks and balances became a crucial document in the establishment o the modern U.S. system of checks and balances.
President Theodore Roosevelt's assertive approach to Latin America and the Caribbean has often been characterized as the “Big Stick,” and his policy came to be known as the Roosevelt Corollary to the Monroe Doctrine.