Nature's Laws

[Freedom4me]

An organism reproducing, or blood clotting, are natural processes. We can look at them and come up with a "purpose", in other words a description of what the process "achieves". But it's really no more than describing it. We're assigning a kind of narrative, and it's easy to get carried away and think that narrative is somehow inherent to the process itself. To put it bluntly, shit happens. As humans, we look for patterns. If stuff didn't work that way, it would work another way.

Yes, if humans couldn't see, it is certainly possible that we would navigate through some other means, such as eccho-location like bats and various other animals.  But either way, "nature" shows itself to be extremely purposeful.  

And yes, if a society decides certain people have no rights, then under that society, those people have no rights. That doesn't mean it's a fair decision, or that other people would agree with it. You can say what rights they should have, but if they aren't ever being respected, they're nothing but wishful thinking.

Why does it have to be a matter of agreement?  How should a person (or a civilization) go about deciding what is "fair"?