Bill McKibben

It's so old, its blood is based in copper, not iron.

And not only could you watch it, you could also help because the wakes of boats would tip over those horseshoe crabs as they were coming ashore to mate.

And they couldn't just go up and down the beach, flipping them back over on their right side.

And you got this, I remember, as deep a connection as I've ever felt to the kind of weight of time on this planet, some sense of

what our actual proportion is.

It's a very good thing to be reminded once in a while that you're actually kind of a small part of a very large, beautiful, buzzing, mysterious, cool, interesting world and cosmos.

What we find, especially now that we're working with older people like me, is that really effective activism isn't just fear translated into action, though sometimes that's what it involves.

but it's also love translated into action.

People keep showing up at these demonstrations we're doing at Third Act with pictures of their grandkids, sometimes even taped to the front of the walker with which they're making their way to the protest or whatever.

And it's extraordinarily moving because you realize that legacy is not some abstraction.

Legacy is the world you leave behind for the people you love the most.

And we're in danger of leaving behind a shabbier world than we found, which will be a novel experience for human generation and one we should do what we can to avoid.

And I'm very glad and proud that people are.

I'm hopeful about the fact that technology is where we need it.

We have a cheap and a workable technology.

I'm hopeful about the size of the movements that we've built from nothing.

We're ready for the test.

And it really is a test.

Climate change is a test about whether or not the big brain was a good adaptation or not.

I mean, obviously, it can get us in some trouble.