I think it's both physical and mental, but if we're able to provide both mental and physical optimum health, the problem would disappear.
As for the population problem, it's a problem either way. I hardly think we can say people need to die so that there's enough resources for other people to live. How is that any different from saying we should kill large amounts of people right now so the rest can lead better lives? It's not really, except for the fact that in one case you're advocating killing them directly, and in the other indirectly. We've got to come up with solutions to the problem of increasing population/diminishing resources, but advocating not preventing death if we can is not the way to go about it.
As for the population problem, it's a problem either way. I hardly think we can say people need to die so that there's enough resources for other people to live. How is that any different from saying we should kill large amounts of people right now so the rest can lead better lives? It's not really, except for the fact that in one case you're advocating killing them directly, and in the other indirectly. We've got to come up with solutions to the problem of increasing population/diminishing resources, but advocating not preventing death if we can is not the way to go about it.
