[Serious] The Good

[Belacqua]

There are no objective final causes.

This seems strange to me. 

If you find an acorn on the ground, you know its final cause: to grow into an oak tree. That's objective.

It might fail to grow, or it might grow a little bit into a stunted oak tree. But it won't grow into an elephant or a dwarf star. That's all the Aristotelian four causes structure says. 

With humans it's more complicated. A human baby has a number of potentials, not all of which it can fulfill fully. The baby's teleology is to grow into a healthy human adult, that part is clear. But whether it should develop, say, musical potential, or choose to neglect that in favor of something else, makes the human case more complex than the acorn's. 

Ultimately the question of the Good, approached from this angle, is whether we can take this truth about human nature and work out what would be good for humans in every case. And again, nothing specific, probably, like "taking Flintstones vitamins" but more general, like health and opportunity.