Peruvian territory was inhabited 14,000 years ago by hunters and gatherers. Subsequent developments include the appearance of sedentary communities that developed agriculture and irrigation, and the emergence of complex socio-political hierarchies that created sophisticated civilizations, technology and monumental construction.
This is a chart of cultural periods of Peru and used by some archaeologists studying the area.
Most of the cultures of the Late Horizon and some of the cultures of the Late Intermediate joined the Inca Empire by 1493, but the period ends in 1532 because that marks the fall of the Inca Empire after the Spanish conquest. Most of the cut-off years mark either an end of a severe drought or the beginning of one. These marked a shift of the most productive farming to or from the mountains, and tended to mark the end of one culture and the rise of another.
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