How were Montesquieu ideas on separation of powers used at the Constitutional convection

Montesquieu argued that the best way to secure liberty and prevent a government from becoming corrupted was to divide the powers of government among different actors who would check each other. ... Madison masterfully protected the separation of powers by establishing a thorough system of checks and balances as well

Explanation:

the american revolution was by the middle and upper class, and the french was by the lower and middle class.