who said balance of power is basic principle of international relations
Balance of power (international relations) The principle involved in preserving the balance of power as a conscious goal of foreign policy, as David Hume pointed out in his Essay on the Balance of Power, is as old as history, and was used by Greeks such as Thucydides both as political theorists and as practical statesmen.[6]
Separation of powers Checks and balances is the principle that each of the Branches has the power to limit or check the other two and this creates a balance between the three separate powers of the state, this principle induces that the ambitions of one branch prevent that one of the other branches become supreme, and thus be eternally confronting each other and in that process leaving the people free from government abuses. Checks and Balances are designed to maintain the system of separation of powers keeping each branch in its place. This is based on the idea that it is not enough to separate the powers and guarantee their independence but to give the various branches the constitutional means to defend their own legitimate powers from the encroachments of the other branches.[15] They guarantee that the powers of the State have the same weight (co-equal), that is, to be balanced, so that they can limit each other, avoiding the abuse of state power. the origin of checks and balances, like separation of powers itself, is specifically credited to Montesquieu in the Enlightenment (in The Spirit of the Laws, 1748), under this influence was implemented in 1787 in the Constitution of the United States.