In which countries of the continent of South America is there a large Indian population?

The Mayans, Aztecs, Incas created highly developed civilizations of antiquity. They had their own writing, chronology and architecture. They had great knowledge in the field of mathematics and astronomy. Archaeologists today find unique artifacts that testify to the former greatness of the extinct Indian culture.
Currently, the largest number of Indians inhabit the territory of Mexico, Bolivia, Peru and Ecuador. On the territory of these modern South American states, before the emergence of European colonialists, inhabited by more than five thousand Indian tribes and peoples. The aggressive policies of the Old World have practically destroyed the culture of the aborigines. Many tribes were completely destroyed, others were expelled from their lands and resettled to reservations.