Efficiency, resistance, complexity.

We do not know yet, nothing wrong in stating that we do not either. Conjecture is the best we have so far and that is not very convincing.

Pragmatically speaking that which we have come to know via science. Is there more to it outside of science that we will perhaps never know? Quite possibly.

I look at good view the lens of human well-being.

Anything which objectively - can only ever - subtracts from human well-being.

Yes, I believe that we have alternative states to choose from but I also think very little of what we do comes from our conscious free will. I do not think we are like rocks falling off the face of a cliff due to erosion.

Order which allows us to function.

Being true to our nature. The difficult thing is finding out what our nature is.

Adherence to internal consistency, logic and consistency with reality, empiricism. It is the best we know of when it comes to knowing truths, if truth is to mean anything at all that is.

To learn, to survive. All the rest is subjective, we give meaning to our lives, we create it.

Not sure, a bit like the first question, hopefully got a few decades in me before I find out.

That which nobody ought to attempt to define.

A lot, I think we will be here for a good while, but chances are that some nut case will make us history.

Do you really think you know who you are?