In the old days, there were lots of elephants and only a few people (some of whom desired ivory). Now there are lots more people, and fewer elephants. Why are we not looking at the problem (one of many similar problems) from both ends?
Well, our systems (start with capitalism, taxation, and religion) are geared to continuous increases in population. Therefore there will be a time when something among our actual needs runs out, (the chances of meeting any of our desires will be first to go, though). What will go first, I wonder? Clean air, clean water, are both currently free for many of us, but I suggest that as the population grows, that number will diminish. By then lots of other useful, desirable, stuff will be running out, such as copper, helium, neodymium, nickel, tungsten, I could go on. So, I suggest that Gandhi was only right when he was alive, the world does not have enough for every man's need, and the 'final solution' will be a reduction in the population – quite likely at our own hands. Unfortunately, history tells us that the 'victors' will not heed the lesson (having of course avoided the worst effects) and round they will go again.
Always cheerful, me
Tim