Passage Summary: Dictatorships often face internal unrest because the people living there don't get a say in the rules and don't understand why those rules exist.

Conclusion: Non-democratic countries are prone to civil disorder because their citizens are frustrated by policies they didn't help create.

Reasoning: In these countries, citizens have no role in making policies, and people are more likely to engage in civil disorder when they don't understand the purpose of the restrictions placed on them.

Analysis: There is a significant 'missing link' between the first and third sentences. The first sentence mentions that citizens have no role in creating policies, while the third sentence mentions that people revolt when they don't understand the *purpose* of restrictions. The argument assumes that if you don't help create a policy, you won't understand its purpose. To find the necessary assumption, look for the choice that bridges this gap between 'participation in creation' and 'understanding the purpose.'