How could one explain these startling resemblances? It was known, of course, that French and Spanish were directly descended from vulgar Latin,[1] and there was no mystery about Latin derivatives like trois and madre. By the same token, the historic kinship between German and English accounted for the closeness of Mutter and mother, of drei and three. The other similarities, however, could be explained only on the hypothesis of some common ancestral source, remote in time.
Eventually, scholars came to agree that there must have been an ancient prehistoric people—hypothetically identified as the “Indo-Europeans”—whose language was the ancestral source of many different linguistic streams. Even today, there is some dispute about the geographical origins of these people; but it is widely assumed that their homeland lay to the north of the Black Sea, in what is now southern Russia. Sometime around 3,000 BC, they must have begun dispersing in waves of migration—north and west into continental Europe, and east and south into Persia and India.
The result today, some 5,000 years later, is what we call the INDO-EUROPEAN FAMILY OF LANGUAGES, consisting of two main divisions (Western and Eastern), each comprising a number of major subfamilies or branches (Germanic, Italic, Indo-Iranian, etc.). The terminology and system of classification may vary somewhat from one authority to the next, but there is general agreement on all the essential features. For our present purposes, it is not important to know the details of this complex system, provided we grasp the basic principles and understand the relative positions of Greek, Latin, and English within the vast language family.
Let us leave to one side the EASTERN DIVISION of Indo-European, whose branches include Balto-Slavic (Russian, Polish, Czech, Serbo-Croatian, etc.); Indo-Iranian (ancient Sanskrit, modern Hindi, Bengali, Persian, Afghan, etc.); Armenian; and Albanian. Suffice it to say that English is at least distantly related to all these languages.
Our work in Greek and Latin Roots for Science and the Social Sciences 250 will relate entirely to the WESTERN DIVISION of Indo-European, which comprises four parallel branches: