You make a lot of assumptions about what I do and don't believe.
I never said I assumed everyone is equal in talent, or that we don't need individual geniuses to keep advancing things. I absolutely agree that some people are smarter and more talented than others, those people can, and do, still easily outperform everyone in our society, and often become far more wealthy than others.
No, society didn't invent the lightbulb, Edison did, and Edison, rightly, benefited enormously from that invention.
But he still don't do it alone. Without the education or opportunities provided by society he would not likely have ever been able to create new inventions, or to commercialize them. Inventing the light bulb is great, but it would likely have never happened without a stable society around Edison so he could spend his time working on such things, nor would he have ever been able to do much with it without such a society and without the infrastructure that it provided.
Besides, I believe we can best encourage that sort of innovation with our patent system, (which I believe is in dire need of reform) not with the tax system.
I'd also point out that inventors are not the only, or even probably most of, the people in our society who create wealth. Regardless of how or why you do it, you can't possibly create wealth without using some of the resources of the wider society and without that society being there in the first place.
I agree that the best way for society to get more is by "investing" in it's best and brightest, but I'm not convinced that the best way to do that is to simply let those that are already wealthy carry the burden of creating wealth for the whole society.
I think "reinvesting" the returns from the investments made in those who become wealthy, into everyone in things like education, and healthcare is the best way to assure that we get more people who are able to realize their full potential.
If a genius is born to a working class family, isn't it a better idea to make sure that that person gets a quality education to nurture their genius? And that that person gets the opportunities they need to fully realize that genius? And since there's no way to really tell where the next genius is going to come from, it seems to me the best way to be sure that that happens is to make sure that there are quality services available for everyone to take advantage of.