> as it always has But that's the thing: it hasn't always. For the last 10,000 years the climate has been relatively stable, and that is the reason that human

> as it always has But that's the thing: it hasn't always. For the last 10,000 years the climate has been relatively stable, and that is the reason that human civilization was able to emerge in the first place. It's hard to build cities if the arable land moves every 10 years. Yes, every age has its doomsayers. But this time it really is different.