What resources did the Inca have?

The comprehension of how irrigation can benefit agriculture is evident by the expansion into the highland areas. They developed drainage systems and canals to expand their crop resources. Potatoes, tomatoes, cotton, peanuts and coca were among the many crops grown by the Inca. Llama were used for meat and transportation. There was more than enough resources available for everyone. Increased subsistence levels led to a growth in the Inca population.


http://www.mnsu.edu/emuseum/prehistory/latinamerica/south/cultures/inca.html


How did some 200 European adventurers manage to take down a chiefdom so mighty? Part of the answer lies in resources, specifically the horses, iron, and steel the Spanish had at their disposal.


http://www.pbs.org/wgbh/nova/inca/weapons.html