Somewhat tangentially related: a non-scientific discussion on what Type I, II, and III Societies are, and why they might not quite make it.<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=XhkwT466ykc" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=XhkwT466ykc</a>