Babylonia as having a monopoly of scientific knowledge, and we of to-day, when we attempt to weigh the new evidence that has come to us in recent generations with the Babylonian records themselves, find that some, at least, of the heritages for which Babylonia has been praised are of more than doubtful value. Babylonia, for example, gave us our seven-day week and our system of computing by twelves. But surely the world could have got on as well without that magic number seven; and after some hundreds of generations we are coming to feel that the decimal system of the Egyptians has advantages over the duodecimal system of the Babylonians. Again, the Babylonians did not invent the alphabet; they did not even accept it when all the rest of the world had recognized its value. In grammar and arithmetic, as with astronomy, they seemed not to have advanced greatly, if at all, upon the Egyptians. One field in which they stand out in startling pre-eminence is the field of astrology; but this, in the estimate of modern thought, is the very negation of science. Babylonia impressed her superstitions on the Western world, and when we consider the baleful influence of these superstitions, we may almost question whether we might not reverse Canon Rawlinson's estimate and say that perhaps but for Babylonia real civilization, based on the application of true science, might have dawned upon the earth a score of centuries before it did. Yet, after all, perhaps this estimate is unjust. Society, like an individual organism, must creep before it can walk, and perhaps the Babylonian experiments in astrology and magic, which European civilization was destined to copy for some three or four thousand years, must have been made a part of the necessary evolution of our race in one place or in another. That thought, however, need not blind us to the essential fact, which the historian of science must needs admit, that for the Babylonian, despite his boasted culture, science spelled superstition. IV. THE DEVELOPMENT OF THE ALPHABET Before we turn specifically to the new world of the west, it remains to take note of what may perhaps be regarded as the very greatest achievement of ancient science. This was the analysis of speech sounds, and the resulting development of a system of alphabetical writing. To comprehend the series of scientific inductions which led to this result, we must go back in imagination and trace briefly the development of the methods of recording thought by means of graphic symbols. In other words, we must trace the evolution of the art of writing. In doing so we cannot hold to national lines as we have done in the preceding two chapters, though the efforts of the two great scientific nations just considered will enter prominently into the story.