The Tang and Song dynasties.
Since many dynasties ruled throughout Chinese history, many leaders also brought golden ages as shown in these two dynasties.
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The Berlin Wall: The Fall of the Wall. On November 9, 1989, as the Cold War began to thaw across Eastern Europe, the spokesman for East Berlin's Communist Party announced a change in his city's relations with the West.
New technologies like steam engines, railroads, and telegraphs made for communication and transportation easier. The ability to source and transport materials across the country with ease turned many local businesses into national companies.
Answer:
Enslaved labor contributed to the foundation of wealth for the colonies because they had more helping hands on farms with cotton and other cash crops, and they had more people to put to work in factories and such.