@ZachWeinersmith watching people talk about the Artemis II mission, so many of them use language that implies it's *very important* for humans to achieve the status of an interplanetary civilization. It's never stated directly, though, just vaguely gestured at or taken for granted as a baseline assumption.
Has anyone made a robust and detailed case for human expansion to the stars? Or even just to Mars? I read your book, but don't recall that particular argument showing up.