Morals are a human construct and unguided evolution has absolutely nothing to do with them.
If morals are a human construct then they have no binding qualities. Large groups of people have passed laws and done things (Hitler, slavery) that were accepted by the culture in which they occurred. If morals are a human construct then slavery, in 1850 would have been "moral". So the idea of morality depending on human trends and desires makes morality utterly meaningless. It is no more than a prevailing opinion.
Unguided evolution has
everything to do with the notion of morality. If we are a product of unguided evolution and nothing else then morality is, at best, a genetically encoded survival mechanism. This concept is weak at best since many moral behaviors are either neutral or detrimental when it comes to survival. And even if true, there is
nothing binding about how our DNA leads us to behave and many behaviors we known to be inherent we find universally reprehensible.
Whether it is moral or not depends on you, and society's consensus of what is moral.
Again, this idea takes all meaning from the word 'moral'. It is a virtual oxymoron. Again, without some level of "oughtness" the idea of relative morals is absurd.
Many people have no concern about human impact on any other specie, or even on other humans. Many have no concern for what sort of world is passed on to the future.
Correct, but your rather classical existentialist view on the matter suggests that people who have concern for others are just as "moral" as those who don't. Right?
In my own view it would be a pretty crappy world without birds and other wildlife, but that's just me.
Me too. But who are we to project our wants and desires on someone else? Unless, of course, there is a moral imperative to do so. But that can only come from one place.
Third: I'm not at all sure about this. I doubt it, but it could be that the total amount of "life" by some measure (biomass?) might be constant. I've never seen anything relating to this.
I'm sure biomass fluctuates. I'm also sure beyond a doubt than some fraction of the biomass will benefit from rising temperatures.
We know that the most biodiversity exists in places where climate has been reasonably constant for the longest periods of time.
I'm sure you'll anticipate this response: Why do we humans, as a species, need to be concerned about biodiversity? Of course I know the pat answers and wholly agree with them. But if biodiversity is declining as we humans ascend, well................
If you feel no responsibility to conserve any of what we've got for the future you'll find nothing in science to contradict you.
Exactly! That's a hard pill to swallow for folks who believe anything preceded by "Scientists say............"
I'm not looking to science to say anything we are doing is wrong.
Correct. Science can say nothing about what is right or wrong. But if your approach to science is purely materialistic
then there are no morals. This is the heart of the existential crisis. That is why, in this argument which at heart is about stewardship, there is nothing the materialist can say about how anyone responds to the data. All answers are correct if each individual is existential comfortable with them. Don't tell me to drive a Prius or turn off my AC because that is your (not you specifically) existential decision, not mine.
Maybe someone a decade or a century from now would enjoy seeing wildlife, or just sitting by a lake and watching the ducks, as much as I do.
Me too. And that's the irony. I believe there is a moral imperative for us to be good stewards of this planet. It is a command. We must do it. We should do it. We ought to do it. But if that command or that imperative comes simply from another person or another group then it can be ignored unless enforced by violence which is how "morals" derived by humans are usually made "moral".