Author Haley Edwards demystifies the concepts behind the history of trade, sharing the interesting ways this fundamental idea has changed over the last half century. This talk was filmed at TEDxMidAtlantic. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. To learn more about TEDxSHORTS, the TEDx program, or give feedback on this episode, please visit http://go.ted.com/tedxshorts.

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