I don't think this responsibility is confined to those who have thought deeply about an issue. If climate change is a menace to the poor today and to future generations, and if we are much involved in fuelling this menace, then we all have a responsibility to act to slow down and stop this phenomenon. If the responsibility were confined to those who have thought deeply about this, the others could easily get off the hook simply by avoiding deep thought.

Still, I agree that as one who understands the problem better one has a special role to play, namely the role of alerting others to their responsibilities. This is something philosophers can do and should do much more of: Help citizens think clearly and critically about their responsibilities as citizens of their state and of the world. In most cases, this indirect way of doing something about the problem is likely to be more effective than direct action. And it has the additional advantage of helping one's fellow citizens avoid involvement in grave wrongs.