When considering intelligence amplification, the book that comes to mind is <i>Psychohistorical Crisis</i>, by Donald Kingsbury. Computer-to-brain interfaces may go a long way in the next few thousand years.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Psychohistorical_Crisis" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Psychohistorical_Crisis</a>