That's pretty awesome. Though I'm sure we could quibble over the relative effects of each upon the course of human history, or the fact that Benjamin Franklin started with almost no means whereas Charles Darwin was born into a wealthy family-- I agree that the takeaway is that we may all have meaningful impacts on society without having to make sacrifices in the name of productivity. But, that being said, I'd personally say those sacrifices are not in vain as I think Benjamin Franklin's contributions to the course of American History outweigh Darwin's contributions to science.