I have no exact figure, but I have seen the number 6.8 billion being used recently for how many human beings there is on this earth now. To what extent is overpopulation a driving force behind today's very serious political and economical problems that so many countries are grappling with? This is only personal conjecture, but I have a feeling that we are rapidly approaching, if we haven't already reached, a kind of breaking point in this respect. No matter how that plays out, it's going to be painful. We can already see that "life" is a commodity of very relative (but steadily declining) value - and the "rich" nations are putting up real and metaphorical fences to protect themselves against the inevitable influx of desperate people. What can "we" do? Each and every one of us? The situation seems hopeless.