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You see, humans existed as a species, physically/biologically, for around 100,000 years without any advances in higher consciousness. We were another animal, very slowly learning to interact with the world we lived in within a purely animalistic/survivalist mindset. Then, rather suddenly, came abstract thought, art, religion, jewelry, and eventually things like language and alphabets. Our consciousness greatly lept forwards, and began exponentially increasing on such a level that it still hasn't stopped. Interestingly, interference from something like Set is by far more parsimonious than the entire human species magically sharing the same mutation which overwrites the previous genetic makeup of the whole species, or even worse having a massive leap forwards as some sort of uncaused event.