The world today is beset with a host of major issues - oil depletion, climate change, food shortages, resource wars, species extinction - to name but a few. But these are only symptoms of the one true problem. "The Real Problem" - the one that spawns all others, and the one that mankind must face at some point - is that there are simply too many human beings on this planet.
Therefore, I suggest, that like "The Play" and "The Open" - hereafter overpopulation should be referred to as "The Problem".
Unfortunately, in today's world, we are content to address only the consequences of the The Problem - climate change, energy depletion, food shortages, etc. This is the same classic mistake that a physician makes in treating only the patient's symptoms, and ignoring the fundamental disease.
So then, the million dollar question is: "Why aren't we addressing the real problem?"