I agree. This is definitely a problem; it's not just refined carbohydrates alone. And even with the abundance/availability of food I think I have an innate (paleo?) desire to hoard and eat like it won't still be there tomorrow.

Also, the fruits we eat today have been cultivated for thousands of years. They are undoubtedly bigger and sweeter than native species.

I'm not interested in dwelling too much on the paleo perspective, though. It seems to me that whatever our ancestors ate was intended to give maximum energy. I don't need to get the maximum amount of energy out of my diet. I need to burn some stored energy off and to stop storing it.