re: #401 Thanos

No, actually there’s a whole progression we could go through.
Nuclear, Hydro, Geothermal, Ocean thermal for now as stopgap, Solar power satellites, Fusion in the longer term, and a Dyson Sphere for the very long term.

Not such a Dyson sphere (or more likely, shell or ring) fan myself. Great for sci-fi stories, but I think that it would be more realistic to just go elsewhere. Our sun is not going to last forever and a project of that magnitude would eventually go to waste. It’s like building a house on the shore when you are reasonable sure the land will end up underwater in the near future.

Even if no manner of manipulating space-time to create non-local FTL effects is ever discovered, nuclear powered generation-ships could make 1-way journeys to spread humanity and keep up from having the whole “all eggs in one basket” single point of failure problem. I think there’s enough hydrogen isotopes for fusion to remain our primary source of power indefinitely once we figure out how to do it correctly.