One of the many problems in considering yourself morally obliged is that any finite present obligation is a step onto a conveyor belt that leads to (countably)

One of the many problems in considering yourself morally obliged is that any finite present obligation is a step onto a conveyor belt that leads to (countably) infinite obligation. If you're being logical, that is, as opposed to drawing random lines in the sand. Obligation to those alive now leads to obligation to their future well-being. That in turn leads to obligation to those not yet alive. That in turn leads to obligation to all future sentience: you are obliged to ensure their existence as best you can, and that is is good. The weight of their existence, trillions of entities even in just the next millenium, is of such value compared to your miserable life that you can do nothing but beggar yourself to achieve the merest sliver of an outcome that would aid them. If you are obliged to anyone then you are also obliged to the (countably) infinite future, by the very same arguments. When you draw lines and say "no more" then it becomes the case that you are only pretending to be obliged - you do this for yourself, a way to satisfy your own irrational desires to some threshold. You don't really care about anyone else, it's all about your own needs. I'm given to think that moral discussions, like mathematics and physics, you pay attention to the infinities because that is how you know where the limits of your process/theory/axioms/system of thought lie.