Some of this comes down to "what counts as secret souce"? Did the "secret sauce" of mouse-gui originate in the 70s with Bell Labs or Apple in the 80s? Did the

Some of this comes down to "what counts as secret souce"? Did the "secret sauce" of mouse-gui originate in the 70s with Bell Labs or Apple in the 80s? Did the secret sauce of early aggricultural civilization (Hati, Sumer, Hindus Valley..) start the first time a person grew stuff for food or when a larger scale grain economy first emerged? There is plenty of evidence that paleo-humans from well before that 70k ybp cutoff was special, unique in the animal kingdom. Knowing what we know about people, a lot of that behaviour was almost certainly cultural and probably language-based. Very complex tool use, hunting and gathering methods, shelters, fire. Perhaps even fire-aggriculture practices. Regardless, 70k ybp (or 40 or 100) the "secret sauce," whatever it is, begins to yield fruit. There are artifacts with symbolic expression, what we'd call art or even politics. The human population grows. We inhabit more (almost all) ecological zones. People get everywhere, including australia by 40-50k ybp. Maybe earlier. Tool invention gets faster... something happened.