It may be pointed out here that, although every human being has much of evil in his nature, yet even the most depraved person desires other people to be good. Even thieves see the advantage to themselves resulting from the fact that most men do not steal; murderers have no inclination toward being themselves murdered, and human beings as a class see the benefits of morality and good living throughout society as a whole. For this reason, and for the still more important reason that most individuals are not very different in their characteristics and abilities from the average of all individuals, the tendency of society is to reduce men to a common level; so that we see only a small fraction who are extremely good or extremely bad, extremely brilliant or extremely stupid, extremely large or extremely small, etc. Similarly, there is only a small fraction of the people who have done much good individually or much harm, or who have exercised individually any noticeable influence of any kind. We may reasonably conclude, therefore, that there were only a few men in primeval days who performed any acts that entitle them to individual recognition; and as the only records that have come down to us indicate that the most important acts were the inventing of certain implements, we seem forced to conclude that most of the recognition accorded to individuals of primeval days may be limited to a very small number, and they inventors. Who they were, and where and when they lived, is not known and probably never will be. For countless centuries their names and personalities have been forgotten as wholly as those of many beasts. But maybe other achievements like those that have exposed the history of certain Oriental kings and wise men to our knowledge, will some day tell us who were the inventors who started the march of human progress, and pointed out the road that it should follow. Yet, if we infer the probable conditions of the remote past from the conditions of the present and recent past, we shall have to conclude that, while the names and deeds of prehistoric rulers may some day become known to us, and even the names of authors, poets and song singers, the names of the original inventors will be forever hid. For inventors have ever been depreciated in their day; even at the present time, despite the known facts as to what inventions and inventors have done for every one of us, the inventor as an inventor is lightly regarded, and so are his inventions. So are his inventions until they have ceased to be regarded as inventions, and have been accepted as constituent parts of the machine of civilization. By that time the inventor has often been forgotten.