[QUOTE=glee]
…(as Qadgop said), suppose you decide Switzerland is a lovely place to live (all that fresh air and decent housing).
How do you slim 6,000,000,000 people into somewhere that can hold 6,000,000 comfortably?
[/QUOTE]
Okay, here’s the plan:
First, we engineer the human lifespan so that it can extend into hundreds and even thousands of healthy years. Sound implausible? It isn’t. Aubrey de Grey, leading the Strategies for Negligible Human Senescence (SENS) project, is getting tons of money dumped at him by rich people to do just that. Eventually, we’ll do it, probably well within the next 30 years.
Then, we pare down the population by not having so many children for a few centuries and concentrate ourselves in the areas of the Earth that are healthiest/safest, so far as we know. Living so long at this point, some people will have to agree to spend a few hundred years or so in the less desirable areas if procuring resources in those areas is necessary. Then others can take their place for a few more centuries, by mutual agreement.
We get ourselves to the point that we know how much each of us needs, minimally, from the planet in order to survive. Then, we can start bulking up the population again if we wish. Some estimates state that, with current resources, Earth could sustain up to 29 billion people. But we’ve only got 6 billion now, and we’re fouling up our environment very severely. Pare down first, build up later.
With the extension of human lifespan, the playing field alters irrevocably. Suddenly it will matter if you badly screw someone over when you’re 35, figuring you’ll both be dead anyway in a few decades. Would you want to meet up with that person again in a few hundred years? We’ll be valuing our own lives much more, and treating each other much better, like each of us matters as much as we’d like to think we matter.