This is assuming of course that the earth is incapable of sufferring. But if that is in doubt, the answer to that question too will depend on scientific study rather than on the ancient traditions of the hypothetical culture in question.
The culture I was thinking of is the Hopi, who are still around but were greatly affected by the colonization of America. They would even apologize to the spirit of any animal they need to kill for food. Everyone and everything is sacred, and scientifically this belief makes sense as it stops them from plundering the planet, keeps them in tune with their habitat, and so helps them survive.
And there won’t be Muslim truth and Christian truth and Jewish truth about whether or not the earth is conscious or whether eating pork is immoral. There will just be the truth.
Given the mess we’re making of the planet, we can’t say that the Hopi are wrong and we are right. We all here have a worldview inherited from the Abrahamic religions, that we have dominion over the Earth. The Hopi belief may sound strange to us but it encapsulates the twin truths that we’re just another species and must care for our habitat.
We’ve begun to arrive at those truths scientifically but our version isn’t plain and simple, it requires analysis and management, and so far new technologies have outstripped our will and capability to reverse or even to limit the damage we’re doing.
So yes, some systems of belief contain outmoded moral imperatives, but that doesn’t of itself invalidate the systems. On evidence we have no more right to insist we know what we’re doing than the Hopi.
Science can help us overcome some of our limitations but it doesn’t make us gods, we can only see the world through human eyes. An idyllic single world culture based on faith in science sounds very enlightened but might get dangerously close to
Brave New World or
1984, and would ironically harm our survival capability by removing diversity. Jiminy Cricket, more relativism.