The principle of separation of powers was made popular by
Thomas Hobbes
John Locke
Niccolo Machiavelli
Baron de Montesquieu
Correct answer is D
The principle of separation of powers was made popular by Baron Montesquieu. He was a french political thinker and Jurist. In his book titled The Spirit of Law, he divided governmental powers into three separate and co-ordinate branches the legislature, Executive and Judiciary.