6 Neal
Salisbury
prominent clans regularly confirmed their power at pot
latches,
during
which they gave away or destroyed much of the material wealth they had
accumulated.
Elsewhere in North America, Mesoamerican influences, combined with
local practices, opened the way to plant domestication. By about 5000
B.C., the peoples of Tehuacan Valley in southern Mexico were cultivating
small quantities of maize, beans, squash, and other plants. From this
beginning, agriculture and related influences moved north via two dis-
tinct streams, one overland to the southwest, the other across the Gulf
of
Mexico to the southeast. The earliest evidence of domesticated plants
north of Mexico is maize and squash at Bat Cave, New Mexico, from ca.
3500 B.C. But for another
3,000
years, the new plants remained marginal
to the subsistence of southwestern peoples.
Around 400 B.C., a new, drought-resistant strain of maize enabled
southwestern cultivators to spread from highland sites to drier lowlands.
Increased yields and the development of storage pits led to larger, perma-
nent villages that in turn became centers for the production of finished
goods and of long-distance exchange. The earliest irrigation systems were
developed in the villages of the Hohokam culture, in the Gila River valley,
after 300 B.C. The coordination of labor required by these systems led to
social ranking and hierarchical political structures. In the larger villages,
platform mounds and ball courts, modeled on those in Mesoamerica,
served as social and religious centers. In the Mogollon and Anasazi cul-
tures,
which emerged over
a
wide area after the third century
A.D.
,
surface
structures supplemented the pit-houses, and specialized storage rooms and
kivas
(religious centers) appeared. Turkeys and cotton were domesticated,
with the latter being woven on looms.
The period from the tenth to mid-twelfth centuries, a period of unusu-
ally abundant rainfall in the southwest, marked the height of Anasazi
expansion and centralization. At Chaco Canyon in northwestern New
Mexico, 15,000 people inhabited twelve villages, or
pueblos.
Each pueblo
consisted of dozens or hundreds of contiguous rooms for dwelling, storage,
and religious services, built around a central plaza with a large kiva.
Despite such intricate organization of such dense populations, there is no
evidence of social ranking or political hierarchy at Chaco. At least seven
other pueblos, at distances of up to 100 miles in all directions, were linked
to the canyon by a system of
roads.
Chaco Canyon's power appears to have
been based on its role as a major source of turquoise production and as a
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