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How and why the economy works… in 3 minutes. At some point in our distant past, a human who had food met another who had a spear. The two exchanged, and departed better off than when they met. Simple as it sounds, a highly evolved version of this concept is the reason we have planes, computers, and the internet today. Professor Antony Davies of Duquesne University and Erika Davies of George Mason University explain.
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