> Insurance for humanity against disaster is a small ROI?
A self-sufficient colony on the Moon would be efficient insurance against most disasters I can imagine and much easier to build. A colony on Mars offers negligible benefit over one on the Moon for the purpose you mention.
A self-sufficient colony on the Moon would be efficient insurance against most disasters I can imagine and much easier to build. A colony on Mars offers negligible benefit over one on the Moon for the purpose you mention.