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- By Not Having Slaves, Peasants Were Hired to Do Jobs Such as Farming. This Allowed for the Poor to Make a Living and Carry on in Society. Also, considering It Was Paid Labor for Agriculture, Advancements in Technology Emerged. They Focused on Creating the Most Efficient Technology Possible to Make Farming Easier and More Efficient. In the Han Dynasty, Social Classes Dictated Status and Not Wealth or Power. "Social Hierarchies." AP World History 2012-2013. N.p., n.d. Web. 06 Sept. 2016.
- Desjardins, Jeff. "Infographic: Currency and the Collapse of the Roman Empire." The Money Project. N.p., 18 Feb. 2016. Web. 04 Sept. 2016.
- Nicholson, Michelle Tennant. "Fall of the Roman Empire." The Huffington Post. TheHuffingtonPost.com, n.d. Web. 01 Sept. 2016.
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- "Ancient Rome - Archaeological Tours." Archaeological Tours. N.p., n.d. Web. 01 Sept. 2016.
- "Greek Coins. Persian Empire. Daric mid 4th Cent. BC, AV 8.33g."ICollectorcom Online Auctions Upcoming Auctions. N.p., n.d. Web. 05 Sept. 2016.
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- "Jeremy Allen." Jeremy Allen. N.p., n.d. Web. 06 Sept. 2016.
- "Persian Empire." By Boscopenciller on DeviantArt. N.p., n.d. Web. 01 Sept. 2016.
- "Qanat." Wikipedia. Wikimedia Foundation, n.d. Web. 05 Sept. 2016.
- "Roman Architecture." Ancient History Encyclopedia. N.p., n.d. Web. 01 Sept. 2016.
- "Romans, Ancient Rome & the Roman Empire." About.com Education. N.p., 25 Apr. 2014. Web. 01 Sept. 2016.
- "Slavery in Ancient Rome - Crystalinks." Slavery in Ancient Rome - Crystalinks. N.p., n.d. Web. 04 Sept. 2016.
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- "Trade Routes." Ancient Rome. N.p., n.d. Web. 04 Sept. 2016.
- "Try Our Free Bibliography Generator." Format Generator. N.p., n.d. Web. 01 Sept. 2016.
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- @ahencyclopedia. "Huns." Ancient History Encyclopedia. Ancient History Encyclopedia, 14 Dec. 2014. Web. 04 Sept. 2016.
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