How many generations of Homo sapiens have there been?

Considering prehistoric norms and a number of cultures even today, if we lower the generation time to 15 years, then we'd be talking about a little over 13,000 generations. As a ballpark figure, it's probably reasonable to estimate that there have been between 10,000 and 15,000 generations of Homo sapiens sapiens. read more

Also, I have seen many other genealogical results close to 30 years per generation. Using 30 years per generation, Homo appeared 83,000 generations ago and Homo sapiens appeared 5,300 generations ago. read more

Modern humans, Homo sapiens sapiens, date back about 200,000 years. If we estimate, for the sake of a round number, that the average woman throughout this prehistory and history had her first child at age 20 (i.e., 20 years per generation), then that would come to about 10,000 generations. read more