Barter system. Economical exchange between people. Humanity history
Schlüsselwörter
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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