1. **Stating the problem:** We need to complete the sentence describing large, aggressive states that conquer and rule over diverse peoples, often associated with oppression but also fostering peace and cultural exchange. 2. **Understanding the context:** The sentence describes entities that are larger political systems encompassing many cultures, often oppressive but also promoting economic and artistic development. 3. **Analyzing the options:** - **Continuities:** refers to things that remain the same over time, not fitting the description. - **Direct democracies:** political systems where citizens directly participate in decision-making, usually smaller and less likely to be oppressive empires. - **Meritocracies:** systems where power is given based on ability, not necessarily large or aggressive states. - **Empires:** large, aggressive states that conquer and rule diverse peoples, often associated with oppression but also cultural mixing and economic development. 4. **Conclusion:** The best fit is **empires**. **Final answer:** empires