Why Will They Be Happy? - Paul Christiano.
"I think that the goodness of a world is mostly driven by the amount of explicit optimization that is going on to try and make the world good (this is all relative to my values, though a similar analysis seems to carry with respect to other aggregative values). This seems to be true even if relatively little optimization is going on. Fortunately, I also think that the future will be characterized by much higher influence for altruistic values. If I thought altruism was unlikely to win out, I would be concerned with changing that. As it is, I am instead more concerned with ensuring that the future proceeds without disruptions. (Though I still think it is worth it to try and increase the prevalence of altruism faster, most of all because this seems like a good approach to minimizing the probability of undesired disruptions.)"