Philosophy
Separation of Powers
Quick fact
The concept of separation of powers was famously articulated by the French philosopher Montesquieu in his 1748 work "The Spirit of the Laws," which heavily influenced the U.S. Constitution.
Why this is interesting
You know that in many countries, the president (or prime minister), the parliament, and the courts all have different jobs. But why are they kept separate? Why not let one person or group do everything?