The present volume begins with an account of what is known about the remotest geological ages and comprises chapters on the different kinds of evidence concerning man and his physical environment up to the end of the Predynastic Period in Egypt and the parallel stages of development in Mesopotamia, Persia, Anatolia, Palestine, Cyprus, Greece and the Islands. To trace the history of these very early times it is necessary to rely chiefly on material remains, since writing had not then been invented. The text offers a setting against which the cultural progress of the historical epoch can be viewed. Archaeological investigation may be expected to bring to light more evidence to fill some of the present gaps in our knowledge, but already it is clear that the gulf between historical and prehistorical times in much of the ancient world is narrower than was once supposed.