The crazy thing is is that epigenetics plays such a massive role that even a single generation of intentional change can produce astronomical differences, like when you see a third-generation Mexican immigrant who is like six foot five, and they go and hug their four foot four grandmother.

That early childhood supply of abundant calories in an active environment with low stressors can make such a huge difference on how your kids end up looking and how their entire lives play out, and those changes will likely propagate down through the generations.