people living on islands should be sufficient evidence of boats
Historical sea levels were wildly different at different times, so not necessarily. For instance, the British isles were settled at a point when it was a part of the mainland: https://commons.wikimedia.org/wiki/File:Doggerland.png
I co-created this, the same thought has been on my backlog for a while. We've experimented with Linked Data/Schema.org compatibility – if this is related to your work, I'd love to move this issue forward. If this is your aim, let's talk (sebastian@sozialhelden.de) :)
I think if you're going to argue that we shouldn't have contemporary immigration because of the harm to native Americans, then you should show what harm is caused _now_, that native Americans actually oppose immigration, and probably that you support other ways of helping them like giving them land back.
Historical sea levels were wildly different at different times, so not necessarily. For instance, the British isles were settled at a point when it was a part of the mainland: https://commons.wikimedia.org/wiki/File:Doggerland.png
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