Europe and US would still not have an ideological high ground even if they fully decommissioned coal. They built their wealth on coal, so from the perspective of BRIC and other still-industrializing countries they would (and in fact already do) appear like they are just trying to pull up the drawbridge. Pressuring developing countries to stop using coal is a lost cause, and will only increase enmity.

What we really have to do is to make alternatives so cheap and reliable, that coal looks like the stupid choice. Renewables can even be sold to certain poor areas (like deserts) as a great chance for an economic leap.