One of the things you need to do for this situation, as well as the stuff in the blog post, is apply what is commonly called "the time value of money" to the co

One of the things you need to do for this situation, as well as the stuff in the blog post, is apply what is commonly called "the time value of money" to the concept. However the concept extends beyond money into any attempt to modify the future, whether or not it involves money. Money just happens to function as a good, quantifiable example in its "score keeping" role here. Your ability to model the future and take actions based on it exponentially decays, and really quite rapidly. Or to put it another way, everything fuzzes out into noise for me much sooner than humanity will have trillions of new members. There's no way for me to predict whatsoever what effect any action I take today will have a thousand years from now. Even in extreme cases, like, I push a magic button that instantly copies whatever you, the reader, believe is the optimal distribution of ideological beliefs out into the world (ignoring for the moment the possibility that your ideology might consider that unethical, this is just a thought experiment anyhow so no need to go that meta), you really don't know what that would do 1000 years from now, what the seventeenth-order effects of such a thing would be. I'm not even saying that it might not be as good as you think or something; I'm saying you just have no idea what it would be at all. So there's no way to hold people responsible for that, and no way to build plans based on it.