Chilean people, or simply Chileans, are the native citizens and long-term immigrants of Chile. Chileans are mainly a mixture of Spanish and Amerindian descent, with small but significant traces of 19th and 20th century European-origin immigrants. A strong correlation exists between the ancestry — or ethnicity — and socioeconomic situation of Chileans, with notable differences observed between the lower classes of high Amerindian ancestry and the upper classes of mainly European ancestry.