There are three full-length biographies of Frank Ramsey:
* Frank Ramsey (1903-1930): A Sister’s Memoir” by Margaret Paul
* Shooting Star: The Brief and Brilliant Life of Frank Ramsey” by Karl Sabbagh (2013)
* (Upcoming) “Frank Ramsey, a Sheer Excess of Powers” by Cheryl Misak (2020). Makes the case that “Had he lived he might have been recognized as the most brilliant thinker of the century.”
* Short bio here by Sahlin: http://www.nilsericsahlin.net/the-philosophy-of-f-p-ramsey/
My take is:
F.P. Ramsey was one of the most underrated thinkers. If he had lived, he would have made the contributions of: Keynes, Samuelson, Arrow, Saul Kripke, Herbert Simon. In pure mathematics, he had a similar style as Hilbert (going to this or that field and turning it upside-down), so he would have done what Paul Cohen did in logic, introducing entirely new methods. He would have revolutionized not just decision theory, but cognitive science, mathematical psychology, economics, combinatorics, probability, linguistics, and maybe theoretical physics, and made pioneering areas the source of non-trivial mathematics. The bio by Margaret Paul makes it clear that Ramsey wanted to establish psychology on rigorous, mathematical foundations, believing that psychoanalysis is muddled. That is, he would have been the Newton and Einstein of both economics and psychology, and maybe also linguistics (none of us would be have to bother with Chomsky’s BS about universal grammar).
Economic recessions would be abolished, as would the nonsense by Marx, Freud, Chomsky etc., and we would all be living in Mars right now.