Hello, and welcome. Is there an evolutionary advantage to an Oedipus complex? IF we are simply animals then a sleeping creature is most at danger when asleep. As such if evolution is true, will we not evolve into creatures that do not sleep. Sharks must keep moving to remain alive and as such each half of their brain sleeps, while the other half keeps them in motion. Like riding a bike! Stop moving and you must put your foot down, leaving a print.