David Brin, interviewed on io9:

Our problems may be dire, but they are within reach of being solved by creative men and women of goodwill, millions and billions of us. Especially if we rediscover the arts of discourse, argument, negotiation, compromise, invention…

…and, above all, if we can defeat the worst drug addiction of our age. By far the most destructive of all: the way that so many humans get on a self-induced high called self-righteous indignation.