LIX THE DEVELOPMENT OF MODERN POLITICAL AND SOCIAL IDEAS The institutions and customs and political ideas of the ancient civilizations grew up slowly, age by age, no man designing and no man foreseeing. It was only in that great century of human adolescence, the sixth century B.C., that men began to think clearly about their relations to one another, and first to question and first propose to alter and rearrange the established beliefs and laws and methods of human government. We have told of the glorious intellectual dawn of Greece and Alexandria, and how presently the collapse of the slave-