My current favourite. I´d have to say that an innate value system is something that all humans share, as we all have to possess one in order to continue living. Survival is not automatic, people must have the ´drive to survive´in order to do so. I´d also like to think that the other value systems don´t get developed unless that one is realized. That is to say, it´s hard to think about beauty when your body is starving.
But once innate values are realized, then suddenly a human has the leisure to think about aesthetics. People spend a lot of time thinking about aesthetics, I think, whether they are considering the beauty of a landscape, a building, an art piece, another human, music, poetry, prose, etc. Of course, although there are many things that many people consider beautiful, each person has some set of values that must apply to an object in order for him/her to call it beautiful.
I don´t think that there is any universal aesthetic value system, nor do I think that all people have a very developed aesthetic value system; but I do think that all people have some sense of aesthetics. Because again, one man´s junk is another man´s gold. But each man has an opinion on the object in question.