Edward Westermarck, on History of People Relationships sonraki Sayfa (1891), employed Darwinian evolutionary concept and you may posited you to incest protection emerged as the an instinct to end the new hereditary harm developed by inbreeding. Westermarck hypothesized that instinct is activated when anyone have been elevated close up, such as for example in the parents. He considered that so it aversion was obvious most frequently among siblings, but Westermarck along with proposed you to sexual repugnance do produce when unrelated pupils was indeed reared together. Which exact same thesis (Westermarck’s theory) is now asserted by sociobiologists out of peoples behavior (individual sociobiologists), just who believe that of numerous complex personal practices was grounded in the hereditary heredity designed of the natural choices.

Past such historical membership, famous reasons of one’s incest taboo are demographic principle, suggested by Slater (1959) and you will elaborated by Charles Circumstances (1969).