Stone tool making tells quite directly about a very old, more than two million-year-old transmitted defect that became much later the core of all humanity.
The pivotal point in interpreting the early human evolution in my hypothesis is to understand how stone tool making begun in the first place. For some reason, this question seems to be wholly ignored in scientific studies. Instead, the first question is, “who were the first stone tool makers”. That sounds like we wanted to find this “mystery species”. But how a single species can be the explanation for making tools?? Species as such do not explain anything; it means just asking the question differently. I’m positive new features like making stone tools did not appear to everyone at the same time. The relatively small number of finds evidences that; if everyone could have made stone tools, there would be many more of them.
So how did the stone tools come from then?
According to the homo reliquiae hypothesis, they came from few individuals who carried a unique feature in their psyche. Most likely, it was a genetic defect (and could have spread like colour blindness) affecting the behaviour by not allowing one to grow psychically into full adulthood. When these affected growing individuals were deprived of mental maturity, unlike other members, they could not adapt to their environment but wanted to modify it to make their lives easier. For this, they created stone tools.
In this video, there are correct and exciting notions, including the fact that tool-making changed the physical appearance of the offspring over time. That is very plausible. However, the most critical question remains unanswered: why did early humans start making tools in the first place?