The Mapuche are a group of indigenous inhabitants of south-central Chile and southwestern Argentina. They constitute a wide-ranging ethnicity composed of various groups who shared a common social, religious and economic structure, as well as a common linguistic heritage. Their influence extended between the Aconcagua River and Chiloé Archipelago and later eastward to the Argentine pampa. The Mapuche make up about 4% of the Chilean population, and are particularly concentrated in Araucanía Region and due to emigration in Santiago.Reference Wikipedia