Abercrombie wrote:
But how should we react? Should our motives extend to protecting the whole globe, or just our own, narrower set of interests?
No sane person wants to be held responsible for, or at least be a party to, a full-on ecological Armageddon, even if it doesn’t affect them directly. Furthermore, no-one wants to leave a screwed up planet (ecologically or politically) for their children either. What does that tell you?
Abercrombie wrote:
We've already seen that altruism and selfishness are inextricably interrelated.
Have we? Surely its one, the other or neither?
Abercrombie wrote:
Do we have a duty of care to people in (say) low-lying areas? Or are they so distant and remote that they should learn to fend for themselves, should the seas rise?
The seas have been rising for the last 10,000 years, since the end of the last Ice Age (something no-one is denying); it rising now possibly isn't related to AGW at all.
Abercrombie wrote:
We need some rational principals here, with regard to economic externalities. When we are acting "selflessly" (as we "should" according to my selfless fellow poster), does that extend to foreign lands without much money or influence? Or is "selflessness" a narrower notion than I thought?
I think your point might be more complicated than it needs to be. We, as in you and me, can't directly know if we're actually having a significant negative impact or not, just like our ancestors had no way of knowing the earth really was as flat as some claimed. The least selfish thing (globally or otherwise) we can do is demand the information necessary to allow people smarter than us to digest, compute, evaluate and respond accordingly; no-one on any side can confidently make an informed decision without this.
Given AGW is meant to be an issue bound by purely by science, is there a better way for us to react?