Evolution

[Abishalom]

Variation is due to mutation. Natural selection determines which mutations are most beneficial in the current setting.

Variation can be caused by mutations (which are rare). But as you've mentioned natural selection filters what mutations are passed down. Nevertheless there are limitations on the amount of variation (this is well documented). See my previous post for links.

Are you aware how variation occurs? You should really think before you post. Obviously you did not even read any of the articles.

Genetic variation occurs by mutation. That is the type of variation we're talking about here.

I am aware the mutations cause variation. But even those can only be passed down through natural selection, and as I've documented there are limitations on natural selection. Also, mutations can only cause so much variation as well.