Whoa dude, that day is a long way off. Just look at Canada
One of the least populated countries per square mile. Come move up here if you're worried about endless cities, and where people have a number not a name. It'll be a long time before Canada is overpopulated!! Of course, you have to like snow, and cold, and dark, and hard work, but if you do, this is the place for you!
Seriously, I can see what you are describing happening within a century or two, but hopefully by that time I'll be long gone.
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Courage doesn't always roar. Sometimes courage is that little voice at the end of the day that says "I'll try again tomorrow".
Maturity is knowing you were an idiot in the past. Wisdom is knowing that you'll be an idiot in the future.
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