I really don't think you want to get into an actual discussion of the morals involved in this issue or any other. Your comments here indicate your grasp of moral philosophy is remedial at best. Comments like " The moral law or the law of right and wrong or the natural law is written into the hearts of men. If the bible had never been written men would still know right from wrong. That's not the problem. The problem is that when they violate it rather than admitting their mistake they rationalize they didn't make a mistake." I have never said that "man was bad". I implied that a mass extinction is not good for humans or the eliminated species. Mass extinctions are NOT evolutionary.
Seeing as I have not made the argument you're opposing, I guess I have some leeway in my response.
When I asked for your definition of "nature" you said "the physical world". You then almost immediately talked about what "matters to nature". You need to sort out in your own head what you actually mean by the term before you attempt to make any use of it in a debate.
No kidding.
Those changes force other species to die. Even the megafauna of North American couldn't adapt when humans migrated on to the continent. Anthropogenic changes these days happen many orders of magnitude to rapidly for a hint of evolutionary adaptation to take place. And for such a self-proclaimed master of science, you don't seem to have any grasp of the actual pace of evolution.
It is not the least bit Darwinian. Species are not being replaced by better adapted mutations, they are simply being wiped out. And their disappearance does not benefit humans.
That depends on the viewpoint.
Is he Humans, with no genetic variations whatsoever, have inhabited every environment on the planet. I would argue that medical science and the other skills we have developed allowing us to modify the environment to our liking has short-circuited evolutionary processes.
The environment is the most important factor in reproductive success. Why do you think we have no polar bears in tropical rainforests or howler monkeys at the South Pole? You really don't know diddly squat about evolution, do you.