Barter system. Economical exchange between people. Humanity history
Palabras clave
barter,
payment,
transaction,
interchange,
commodity,
social,
humankind,
buy,
bargain,
exchanging,
money,
deal,
giving,
exchange,
sell,
purchase,
evolution,
distribution,
sheep,
cattle,
good,
vector,
trade,
return,
profit,
people,
person,
character,
human,
ancestor,
theory,
lifestyle,
development,
period,
anthropology,
studying,
ancient,
culture,
antique,
historic,
history,
past,
civilisation,
archaeology,
historical,
education,
science
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