Answer:
Montesquieu
Step-by-step explanation:
Charles-Louis de Secondat, Baron de La Brède et de Montesquieu, commonly referred to as simply Montesquieu, was a man of letters and a French judge. Montesquieu was a political philosopher who originated the theory of separation of powers, which is the basis and backbone of many constitutions throughout the world. His thoughts and ideologies I'm the Spirit of law impacted the modern world greatly as he laid out the principles of separation of powers in this book