It'll be all of our efforts together. It won't won't ever be exactly the way I imagined it. And that is, I think, an important lesson as well, is that in any group enterprise it's going to be the sum total of the group.
Land bridges were everywhere during the extinction, many species were spreading, and there were many diseases.
It's haunting to realize that half of the languages of the world are teetering on the brink of extinction.

