Carl Sagan, writing in Cosmos:
“There will be no humans elsewhere. Only here. Only on this small planet. We are a rare as well as an endangered species. Every one of us is, in the cosmic perspective, precious. If a human disagrees with you, let him live. In a hundred billion galaxies, you will not find another.”
(My long-held fantasy is to somehow bring Carl’s consciousness back into an AI system and have it run a giant metal rocket-powered dinosaur with laser hands, so he can fly around the world and stop people blowing each other up and denying climate change and starting wars, and then broadcast his wise words from the dino loudspeaker. I’d watch that superhero movie.)