In What We Owe The Future, philosopher William MacAskill persuasively argues for longtermism, the idea that positively influencing the distant future is a moral priority of our time. It isn't enough to mitigate climate change or avert the next pandemic. We must ensure that civilization would rebound if it collapsed; cultivate value pluralism; and prepare for a planet where the most sophisticated beings are digital and not human. The challenges we face are enormous.But so is the influence we have.