You might agree that future people matter in the abstract. But it’s this point — that our actions today could meaningfully impact their lives — that might compel you to believe that positively influencing the long-term future should be a key moral priority of a time. This is the idea encapsulated by longtermism.

What happens when we no longer limit the scope of our concern to just the next couple of generations? Once we consider how many generations could follow ours, the implications look striking: our actions could influence the lives of far more people than many expect.