Can Prophecy be a science Science, at any rate, appears to aim at prophecy. We are Often told that the test Of an hypothesis lies in the events that it predicts but it is a test that is much too rarely applied. We are surprised when Biologists apply it in a systematic way to the theory Of evolution. Historians also tell us that the study Of the past will help us to foresee the future, but in their practice they hardly succeed in catching up to the present. The organum Of human knowledge, in fact, presents a curious spectacle a vast system Of foundations but no sign Of the edifice these foundations are to bear. At least such was the case until recently. In the little prophetic volumes recently published we can see perhaps, the preliminary sketch Of its imposing elevation.