As the intelligence of man increased, and his consequent need for better means of expressing himself in writing increased, the idea occurred to someone to use conventional drawings to represent vocal sounds, instead of pictures of visible objects. The first writing of this kind, called phonetic writing, used characters that represented spoken words, and therefore required many characters and necessitated long and tedious study to master it. It was gradually replaced among most peoples by an improved phonetic system, in which each character represented a syllable instead of a word; though the Chinese have never wholly abandoned it. The syllabic system needed, of course, fewer characters, and was much more easily learned, much more flexible and generally satisfactory. The syllabic system was finally replaced among the more progressive peoples by the alphabetical system, in which each character represents a separate vocal sound. As the number of separate vocal sounds is few, only a few characters are needed. In most alphabets, the number of characters varies between twenty-two and thirty-six. We of the present day plume ourselves greatly on our achievements in invention, and point to the tens of thousands of scientific appliances, books and works of art with which we have enriched our civilization. To most of us, prehistoric man was an uncouth creature, living in caves and uncleanly huts, and so far removed from us that in our hearts we class him as little higher than the beasts. Yet to prehistoric man we owe all that we are and all that we have. The gift of life itself came to us through him; and so did not only our physical faculties, but our mental, moral and spiritual faculties as well. It was prehistoric man who invented the appliances without which the wild beasts would not have been overcome, and the man, wilder than himself, been kept at bay; by means of which the soil was tilled, and boats were made to move upon the water, and villages and towns were built. It was prehistoric man who invented spoken language and the arts of drawing, painting, architecture, weaving and writing. It was prehistoric man who started the race on its forward march, and pointed it in the direction in which it has ever since advanced. It was prehistoric man who made the inventions on which all succeeding inventions have been based. The prehistoric inventor exercised an influence on progress greater than that of any other man. CHAPTER II INVENTION IN THE ORIENT The first countries to pass into the stage of recorded history were Egypt and Babylonia. Excavations made near the sites of their ancient cities have brought to light many inscriptions which, being deciphered and translated, give us clear knowledge of the conditions under which they lived, and therefore of the degree of the civilization that they had attained.