The principle of separation of powers is associated with:

**The reasoning** The **separation of powers** is the idea that government should be divided into three branches — Executive (enforces laws), Legislative (makes laws), and Judiciary (interprets laws) — so no single person or group becomes too powerful. **Baron de Montesquieu**, a French philosopher, fully developed this principle in his 1748 book *The Spirit of the Laws*. He studied the English system and argued that dividing governmental power protects citizens' freedom. This influenced many modern democracies, including Nigeria's presidential system where the President, National Assembly, and Courts operate independently. **Why the wrong options tempt you** **John Locke (A)** talked about natural rights and government by consent — important, but he didn't detail the three-branch separation. **Karl Marx (C)** focused on class struggle and communism, not governmental structure. **Adam Smith (D)** wrote about free-market economics (*The Wealth of Nations*), not political power division. These thinkers all sound "important and political," so your brain might grab any familiar name under exam pressure. **Quick takeaway** Remember: **"Montesquieu → Separation of powers"** — he's the architect of the three-branch system that keeps power balanced.