Tractatus Logico-Philosophicus
Ramsey and John Maynard Keynes cooperated to try to bring Wittgenstein back to Cambridge (he had been a student there before World War I). Once Wittgenstein had returned to Cambridge, Ramsey became his nominal supervisor. Wittgenstein submitted the "Tractatus Logico-Philosophicus" as his doctoral thesis. G.E. Moore and Bertrand Russell acted as examiners. Later, the three of them arranged financial aid for Wittgenstein to help him continue his research work.