Socio-political structures were usually not highly developed in this area. The Tupi-speaking groups lived in villages in which related families resided together in large houses. They practiced slash-and-burn agriculture, and hunted and fished using blowguns and poinson-tipped arrows. Manioc, a tuber, was their staple crop. They engaged in warfare and some groups practiced ritual cannibalism. Tupan groups eventually overcame the Tapuyas, mobile hunters and gatherers.
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