Even though we are all different in our own ways, we all have an underlying thread in common: our evolution, our history.

However, only roughly 0.0001 % of the Earth’s whole history has been occupied by human beings with behaviorally contemporary traits. We are, in fact, right at the start of everything. Yet, in order to survive even for such a short period of time, a seemingly unending line of fortunate events was necessary.

But what were these fortunate events? How did Homo sapiens get he...