Analysis of information sources in references of the Wikipedia article "Merchant" in English language version.
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The Forum Boarium was the cattle-market or Smithfield of ancient Rome [...].
Perhaps the only substantiated type of retail marketing practice that evolved from Neolithic times to the present was the itinerant tradesman (also known as peddler, packman or chapman). These forerunners of travelling salesmen roamed from village to village bartering stone axes in exchange for salt or other goods (Dixon, 1975).
We see the permutation and extension of the traditional economic elements in highly planned economy. The anti-commerce policy reached to such an extreme that merchants were dismissed as the capitalist heresy.