> why would you think 'modern civilization' would be limited to one planet? Because we're nowhere near ready to live outside earth! Approximately no human live

> why would you think 'modern civilization' would be limited to one planet? Because we're nowhere near ready to live outside earth! Approximately no human lives in a desert, on a glacier, or below the ocean surface, even though that's easy compared to living anywhere else in the solar system. Humans are not made for space. My prediction: By the time we have sufficiently advanced tech to keep humans alive in space, the humans won't be necessary anymore. Why ship delicate bags of water between planets? It's sheer hubris to think humans will play a role in space. It'll be machines that don't suffocate or freeze at the slightest inconvenience.