"Cruel leaders are replaced only to have new leaders turn cruel." - Che Guevara
I won't blame you if you don't know or haven't heard of the revolutionist. I can't elaborate much because my knowledge in World History is taking a beating and my friend hasn't been able to pass me his textbook for me to review and send for photocopy.
But to get you familiarized with him, do watch the attached documentary. You'll be able to understand why the Cuban Missile War, the CIA-led overthrow of the then-president of Cuba and his fighting for a revolution are heavily interconnected.