George Segal’s Depression Bread Line sculpture, which symbolizes the struggles of the Great Depression, at the Franklin Delano Roosevelt Memorial in Washington DC.

Photo Credits: © Michael Thompson/123RF; Victor Pelaez Torres/123RF

The U.S. Department of the Treasury in Washington DC.

Photo Credits: © Michael Thompson/123RF; Victor Pelaez Torres/123RF

Treasury checks.

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The Federal Reserve Bank in Washington DC.

Photo Credits: © iStockphoto.com/agshotime; Visions Of America LLC/123RF

Arturo Di Modica’s Charging Bull sculpture in New York City’s Financial District, symbolizing America’s financial power.

Photo Credits: © konstantin32/123RF; Dusit Panyakhom/123RF

Supply and demand chart.

Photo Credits: © konstantin32/123RF; Dusit Panyakhom/123RF

U.S. currency.

Photo Credits: © Joo Lee/123RF; Ashwin Kharidehal Abhirama/123RF; Robert Brown/123RF

World currency.

Photo Credits: © Joo Lee/123RF; Ashwin Kharidehal Abhirama/123RF; Robert Brown/123RF

Nineteenth-century stock certificate.

Photo Credits: © Joo Lee/123RF; Ashwin Kharidehal Abhirama/123RF; Robert Brown/123RF

Stock market electronic board.

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New York Stock Exchange.

Photo Credits: © Thomas Pajot/123RF; Stuart Monk/123RF

The North Side Headquarters for the World Bank in Washington DC.

Photo Credits: © Jim Pruitt/123RF; Dmitry Rukhlenko/123RF

Under the gold standard, money is backed by a fixed amount of gold, which allows a country to only print as much currency as there is gold to back it up.

Photo Credits: © Jim Pruitt/123RF; Dmitry Rukhlenko/123RF

President Woodrow Wilson who signed the Federal Reserve Act into law in 1913, creating the Federal Reserve System.

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Newspaper headlines from the Great Recession.

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Statue in Edinburgh, Scotland, memorializing Scottish thinker Adam Smith, considered the father of modern economics.

Photo Credits: © zechal/123RF; Public domain via Wikimedia Commons

John Maynard Keynes was a British economist who influenced a school of thought in which government spending is seen as an economic stimulus.

Photo Credits: © zechal/123RF; Public domain via Wikimedia Commons

Alan Greenspan, an American economist, served as Chairman of the Federal Reserve of the U.S. from 1987 to 2006.

Photo Credits: © zechal/123RF; Public domain via Wikimedia Commons