 There has never been, as a scientist, reason to be more nervous than today. We are standing on so much evidence that we actually, for the first time ever, as scientists need to pose the following question. Are we, as humanity, at risk of destabilizing the whole Earth system? We've never had to pose that question before. We've never researched that question before. That we, as humanity, could actually destabilize the whole planet. But I can tell you, as a scientist, there's never been more reason to feel schizophrenic, because if there's never been more reason to be nervous, there's never been more reason to be hopeful. It's quite extraordinary. We see so much evidence of a transformative embarkation on a journey that can actually take us back to a safe operating space on Earth.