The Rockefeller Brothers Fund pledged to divest from fossil fuel.

In addition to punishing fossil fuel companies' stock price — which could be cancelled out if other investors buy in — the divestment movement can concentrate plutocratic lobbying power in favor of decarbonization. Plutocratic lobbying power is an injustice, and to restore democracy we must get rid of it, but in the mean time setting some of it against global heating is a step forward.