Yes, but it would be unconscionable to lessen the population through war or crime, or allowing natural disasters, disease, famine, or withholding medical care, and things like that to reduce it. I would never volunteer to die in order to lessen the population of the world, and I would never ask or demand that of anyone else either.
I think we SHOULD have slowed the pace of reproduction earlier, but now we have the people we have, so we should try to provide the best quality of life possible for everyone that's here today.
What I think we should do, is focus on improving quality of life, and longevity for the people we have here right now.
And I think contraceptives and the education to use them effectively, should be a top priority worldwide. The people who are opposed to it religiously, I think, need to chill out and let this one go. They can believe what they want in their personal lives but this is going to be a real humanitarian concern. Let's get this under control before it gets any worse, and worry about religion later. It's almost like using substances - if you want to do whatever you want to yourself, that's fine as long as it only affects you. But once it starts affecting the community, then it becomes a problem because your freedoms start stepping on everyone else's freedoms.
What do you do when life feels hopeless and you don't have too much faith that things will get better?