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Why did some Indigenous groups survive in remote and marginal parts of South America?

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distribution of aboriginal South American and circum-Caribbean cultural groups — South American nomad Distribution of aboriginal South American and circum-Caribbean cultural groups.

Indigenous groups in South America survived in remote and marginal regions primarily because these areas were unattractive or inaccessible to European soldiers and settlers. During the colonial period, Indigenous populations living along major navigational routes and coastal areas faced severe threats, including violence, enslavement, and the introduction of diseases.123

To escape these pressures, many Indigenous peoples fled into the hinterlands, such as the forested regions of the Amazon and Tocantins basins or the savannas of Mato Grosso. These remote environments provided a refuge where groups could avoid the intensity of European exploitation that decimated populations in more accessible, resource-rich areas.413

While some groups were eventually assimilated or faced continued encroachment, those who retreated to these isolated territories were able to maintain their traditional languages and cultures for longer periods. Today, many of these surviving communities continue to advocate for their rights and the preservation of their ancestral lands against ongoing challenges from commercial development and illegal resource extraction.243