Mastering fusion power doesn't just save us from global warming. It also changes the nature of planets, stars, and our relationship to them.
Without captive fusion, we can imagine a long-haul space vessel carrying humanity from one star system to another, to begin a new existence on a new home.
With captive fusion, we can imagine the long-haul space vessel becoming the next iteration of a planet. If you have all the energy you need and you can direct yourself as needed, why be bound to planetary surfaces and stellar orbits?
