Here are afew things, Under water warfare sub, the chronometer, and the toilet.
"Yick Wo v. Hopkins, 118 U.S. 356 (1886), was the first case where the United States Supreme Court ruled that a law that is race-neutral on its face, but is administered in a prejudicial manner, is an infringement of the Equal Protection Clause in the Fourteenth Amendment to the U.S. Constitution.
The three things that helped the Tang Dynasty was:
Silk road, trading colonies and shipbuilind.
The silk road was a trading routes connecting the East and West.
The trading colonies dealt with cotton, rice, tobacco, indigo (dye), lumber, furs, and farm products; that is what most of the people traded back in the tang dynasty. They will trade these things for food, clothing, books, medicine and sometime homes.
The shipbuilding made a huge part because the people would build ships to trade things to different lands. Usually when they trade more things to different lands they'll get more money.
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The protectionism adds a new kind of tax on the imports called Tariff. With the Tariff, the price of imports is increased, and becomes more expensive than locally produced products. This will protect the domestic economy.
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