linguistic:paraphrasing, structural:expansion, structural:scholar_edition, quality:corruption, linguistic:voice_change
The Pre-Columbian period

The Caribbean region had sedentary populations settled by Arawak or Tainos and in what is now Brazil, many Tupian peoples lived in fixed settlements. Semi-sedentary populations had agriculture and settled villages, but soil exhaustion required relocation of settlements. Populations were less dense and social and political hierarchies less institutionalized. Non-sedentary peoples lived in small bands, with low population density and without agriculture. They lived in harsh environments. By the first millennium CE, the Western Hemisphere was the home of tens of millions of people; the exact numbers are a source of ongoing research and controversy.