TimeSeeker wrote: ↑Tue Sep 18, 2018 6:56 pm
We can get to society (as a whole) in a second. Do YOU - the individual accept the argument? That avoiding extinction is the only useful conception of "objective mortality", thus cooperation is a better strategy to competition towards the goal? From which the "no harm" principle emerges.
Well, as I said, "extinction" isn't a real threat to those who believe in killing. What they do is simply to define their parameters: like, "Let's kill all the half-wits," for example (or "Just the unborn," or "Just the Jews," or "Just the....whoever.") Since most people are not "half-wits,"or whatever you choose, the species is not threatened; in fact, from a eugenic perspective, some might even argue that it would be helpful to the species if "half-wits" (or the others 'we' don't like) died out.
So "avoid extinction" gives us no particular moral precepts at all...not even enough guidance to speak against broad-scale genocides, provided they are defined so as not to include everyone, or provided we stop short of killing everyone.
There is also no "no harm" principle available in a world without God. To say, "It's wrong to harm," simply begs the question, "What is harm?" (And if you think that can't go wrong, consider that in the US alone, in the last year, almost 800,00 babies have been aborted, including half of the black babies that could have been born in New York City during the same period: is that "harm," or is it a good thing, would you say?) Moreover, what tells us that doing "harm," whatever we consider that to be, is actually "wrong"?

In the animal world, "harm" happens all the time, and it's just the Law of Nature: there's nothing moral about it, and if we are merely animals, why would it be wrong for us to kill each other -- or even the whole planet, if it suited us to do it (for example, if the bad effects will only be felt by future generations, and the money is to be made for us right now, by polluting the planet)?
So while what you suggest
soundsvaguely nice and well-intended, that's all it does. It's incapable of telling us whether or not we should do anything.
And that means it fails the minimum we ought to expect of anything we call "moral": that it should tell us definitively that
something is right, or
something is wrong. If the "no harm" principle actually provides no such information, then what good is it?