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Performance Performance. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. They abandoned their hunter-gatherer lifestyle and had to come up with a new food source. What we see now as a desolate landscape would have been fertile as a result of that climate change.
With so much water suddenly available, irrigation became a relatively simple solution. They turned to agriculture, cultivating crops.
They traded these crops with people who stayed on the coast and kept fishing -- thus the fish bones and shells scattered throughout the region. This type of centralized, communal food production and organized trade for resources would have led to a centralized society.
They built permanent homes and sunken plazas for gathering. The mound builders seem to have had an organized government and religion. The civilization lasted for about a millennium [source: ScienceDaily ]. Geological discoveries point to an end very similar to the beginning: Another shift in climate made irrigation more difficult, and the mound builders moved away to more fertile ground, leaving behind their world. It's not the first society believed to have been monumentally affected by weather shifts.
Around that same time, the Mayan civilization collapsed due to a series of droughts that diminished the water supply. The common link, aside from drought, appears to be a resistance to change. It's a logical end: An agriculture-based society collapses in the face of water shortage. A society that shifts with the weather -- perhaps moving from agriculture-derived resources to trade-based ones -- has a better chance of surviving a climate shift that threatens its way of life.
Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Another possibility is that the Mound Builders died from a highly infectious disease. Although it appears that for the most part, the Mound Builders had left Ohio before Columbus arrived in the Caribbean, there were still a few Native Americans using burial practices similar to what the Mound Builders used.
The Mississippian Period in the midwestern and southeastern United States, which lasted from about A. Mississippian people were horticulturalists.
The culture was based on intensive cultivation of corn maize , beans, squash, and other crops, which resulted in large concentrations of population in towns along riverine bottomlands.
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