Complex sentence: Freud argued that members of the same family lust for one another, making it necessary for societies to create incest taboos, but Westermarck argued that incest taboos arise naturally as products of response mediated by a relatively simple inherited epigenetic rule, namely the Westermarck effect.
Split into simpler sentences: Freud argued that members of the same family lust for one another, making it necessary for societies to create incest taboos. Incest taboos arise naturally as products of response mediated by a relatively simple inherited epigenetic rule, namely the Westermarck effect.