Even in ancient Africa, there is history -- if only in numerous carvings and
rock paintings, but not writing. And, it is because of their culture, not
their intelligence, that they didn't have writing. Are you suggesting that
no regional or local population of people (fully as intelligent as we are)
had a culture that would permit writing for over a 100,000 years? Then one
day, all the planets aligned and thus diverse (although, not all) groups of
people starting writing?