They were not a highly cultured people, but were living a nomadic life, engaged in hunting, fishing, piratical exploits, and carrying on agriculture intermittently. They had also become acquainted with the use of metals, having passed during this period from the Neolithic into the Bronze Age. About the year 1500 B.C. they had become acquainted with iron, and about the same time had come into possession of the horse, probably through their contact with central Asia. The social life of these people was very simple. While they undoubtedly met and mingled with many tribes, they had a language sufficiently common for ordinary intercourse. They had no writing or means of records at all, but depended upon the recital of deeds of warriors and nations and tribes. Wherever the Aryan people have been found, whether in Greece, {209} Italy, Germany, along the Danube, central Asia, or India, they have been noted for their epics, sagas, and vedas, which told the tales of historic deeds and exploits of the tribal or national life. It is thought that this was the reason they developed such a strong and beautiful language. They came in contact with Semitic civilization in northern Persia, with the primitive tribes in Italy, with the Dravidian peoples of India, and represented the vigorous fighting power of the Scythians, Medes, and Persians. They or their kindred later moved up the Danube into Spain and France, with branches into Germany and Russia, and others finally into the British Islands. It was a branch of these people that came into the Grecian peninsula and overthrew and supplanted the Aegean civilization--where they were known as the Greeks.