*Kat* wrote:Cities can be rebuilt again and again. Example: Charleston, South Carolina. It was leveled by the Civil War (1864?), drowned by a hurricane (1868?), and flattened by an earthquake (1886). From the ashes it rose again. Similar stories can be told about Galveston, Chicago, San Francisco and New Orleans.
This is getting more expensive. Cities today have sewers, subways, electric, telecom, gas and fresh water pipes. Roads are paved with various materials. All that infrastructure costs billions to rebuild. It's not just houses anymore.
Well into the 19th century, towns all over the world would be used and then discarded. That's the story of American ghost towns and abandoned villages in Europe and the middle east. The infrastructure now makes this untenable. Pretty much anywhere that was inhabited in the mid-20th century is still inhabited. Too expensive to build a new town in a slightly better place. Instead, we pave a road there.
People who fear global warming fear losing land to the sea, but what about the land we will gain?
A lot of people live close to the shores and in low lands. There's a net loss of land, and the loss is mostly from some of the most densely inhabited land.
There are large stretches of Earth where few people live because its too cold and too dry. Global warming will change that. Places that are now cold and dry will become warmer and wetter -- and more hospitable. We'll lose islands but gain lakes. There is a whole continent at the south pole inhabited by nothing but penguins and their predators that we can move onto.
It's also dark there for six months at a time. I'd rather have my tropical islands than a cold, dark Antarctica.
Will this lead to huge socio-political upheavals? Yeah. But again, that's not a bad thing. History has shown time and again that the longer things stay the same, the more rotten the status quo becomes. Example: Every Empire Ever.
So, permanent revolution (http://en.wikipedia.org/wiki/Permanent_revolution)? Those upheavals in the middle east have definitely worked out well for them, right?
Earth's climate *has* changed in the past. It has done so without human influence. It *will* change in the future, with or without our help. Volcanoes will erupt. Asteroids will strike. And when they do the climate will change. Maybe for a few years. Maybe for a few hundred years. Either way, we will survive.
We will survive. That does not automatically imply that you and I will survive.