Sandberg tells us about the current human situation, possible future trajectories, the explanation for the undersupply of efforts to reduce catastrophic risks, humanity's wisdom and coordination, the risks posed by nation states, the methodology of exploratory engineering, whether metaphors can help us understand the vastness of the future populations, how grand the universe could be if we stayed on Earth versus if we expand into the universe - and whether we should expand before we have solved ethics, artificial general intelligence scenarios, the poetry of GTP-3, consciousness and ethics, authenticity and the self, AI assistants, mind-enhancing drugs, direct brain stimulation, mind-uploading, self-replicating space probes, terraforming, the possibility of aliens, the ultimate limits of complexity and consciousness in the universe and how much of this picture might change with our evolving understanding of physics.