Final answer:
Baron de Montesquieu refined the concept of the separation of powers and checks and balances in his work, The Spirit of the Laws.
Explanation:
Baron de Montesquieu, a French enlightenment writer, wrote The Spirit of the Laws in 1749, where he refined the concept of the separation of powers by advocating that the executive, legislative, and judicial functions of government should be separate entities. Montesquieu explained that each branch should regulate the others through checks and balances.
Learn more about Montesquieu's The Spirit of the Laws and the separation of powers here:
https://brainly.com/question/1278488
