Thus, as the extension of the citizenship carried the principles and practice of Roman law to every quarter of the empire, the spirit of that law underwent an entire change. It became exact, impartial, liberal, humane. It limited the use of torture to force confession from persons accused of crime. It protected the child against a father's tyranny. It provided that a master who killed a slave should be punished as a murderer, and even taught that all men are originally free by the law of nature and therefore that slavery is contrary to natural right. Justice it defined as "the steady and abiding purpose to give every man that which is his own." [18] Roman law, which began as the rude code of a primitive people, ended as the most refined and admirable system of jurisprudence ever framed by man. This law, as we shall see later, has passed from ancient Rome to modern Europe. [19] LATIN IN ITALY The conquest by Latin of the languages of the world is almost as interesting and important a story as the conquest by Rome of the nations of the world. At the beginning of Latin in Roman history Latin was the speech of only the Italy people of Latium. Beyond the limits of Latium Latin came into contact with the many different languages spoken in early Italy. Some of them, such as Greek and Etruscan, soon disappeared from Italy after Roman expansion, but those used by native Italian peoples showed more power of resistance. It was not until the last century B.C. that Latin was thoroughly established in the central and southern parts of the peninsula. After the Social War the Italian peoples became citizens of Rome, and with Roman citizenship went the use of the Latin tongue. LATIN IN THE WESTERN PROVINCES The Romans carried their language to the barbarian peoples of the West, as they had carried it to Italy. Their missionaries were colonists, merchants, soldiers, and public officials. The Latin spoken by them was eagerly taken up by the rude, unlettered natives, who tried to make themselves as Roman as possible in dress, customs, and speech. This provincial Latin was not simply the language of the upper classes; the common people themselves used it freely, as we know from thousands of inscriptions found in western and central Europe. In the countries which now make up Spain, France, Switzerland, southern Austria, England, and North Africa, the old national tongues were abandoned for the Latin of Rome. ROMANCE LANGUAGES