Answer:
Separation of powers is a political doctrine originating in the writings of Charles de Secondat, Baron de Montesquieu in The Spirit of the Laws, in which he argued for a constitutional government with three separate branches, each of which would have defined abilities to check the powers of the others.
Explanation:
I'm not sure if it's multiple choice or write in, but Charles was the first to coin the idea, while Baron introduced it fully first.
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