Genes are by far the most important factor. If you've bred animals, you'll understand this. Take a couple of poor animals and breed them. They'll have poor offspring. You can do all you like in their environment, but they'll still be poor.
Select high quality parents, and you'll have high quality offspring. Selective breeding works extremely well to produce the best quality animals/plants.
I have no idea why we're in an age where it's so un-politically correct to say this about humans.
Some people just seem to have their fingers in their ears when it comes to inconvenient facts that don't mesh with their "everyone is equal!" agenda.
I have no idea why we're in an age where it's so un-politically correct to say this about humans. Some people just seem to have their fingers in their ears when it comes to inconvenient facts that don't mesh with their "everyone is equal!" agenda.
edit: Downvote away. I'm sure that'll change the obvious biological facts.