Few philosophers of the twentieth century have influencedthe sciences as much as Frank Plumpton Ramsey (1903-1930). He did pioneering work in pure mathematics logiceconomics statistics probability theory decision theory andcognitive psychology. His philosophical works includedUniversals (1925) Facts and propositions (1927)Universals of law and of fact (1928) Knowledge (1929)Theories (1929) and General propositions and causality(1929). Some philosophers consider him to have been or atleast to have had the potential to be an even greaterphilosopher than Wittgenstein. But Ramsey died young - atthe age of 26 - after an abdominal operation.