The most serious population explosions are occurring not in the West, though affluence and high consumption increases its impact. It's in the underdeveloped world.
Thus, fortunately, the Islamic State is pioneering birth control efforts. See
ISIS Pushes Birth Control to Maintain Sex-Slave Supply. Apparently, ancient tradition, as reinterpreted by ISIS, requires that a man who enslaves a woman for sex must ensure she doesn't become pregnant.
This is interesting enough that I would like to learn some more Islamic liturgy.