How long does it take for mutation-driven evolution of the human brain to occur?
If you don’t know, we could compare your guess in the context of how long it takes for nutrient-dependent pheromone-controlled adaptive evolution of the human brain to occur. For example: “The findings confirm their earlier work suggesting that the majority of variants, including potentially harmful ones, were picked up during the past 5,000–10,000 years.” Also: “As Gibbons (1998) noted, by using the modified putative genetic clock, Eve would not have lived 200,000 years ago, as Cann et al. had contended, but only 6000 years ago.”
When I read about results from studies that so clearly appear to refute beliefs in mutation-initiated natural selection, I wonder what others think the results mean, or if they simply ignore them because the results challenge their beliefs.