The first languages were probably small collections of such words; they consisted of interjections and nouns. Probably the nouns were said in different intonations to convey different meanings. If Palæolithic man had a word for “horse” or “bear,” he probably showed by tone or gesture whether he meant “bear is coming,” “bear is going,” “bear is to be hunted,” “dead bear,” “bear has been here,” “bear did this,” and so on. Only very slowly did the human mind develop methods of indicating action and relationship in a formal manner. Modern languages contain many thousands of words, but the earlier languages could have consisted only of a few hundred. It is said that even modern European peasants can get along with something less than a thousand words, and it is quite conceivable that so late as the Early Neolithic Period that was the limit of the available vocabulary. Probably men did not indulge in those days in conversation or description. For narrative purposes they danced and acted rather than told. They had no method of counting beyond a method of indicating two by a dual number, and some way of expressing many. The growth of speech was at first a very slow process indeed, and grammatical forms and the expression of abstract ideas may have come very late in human history, perhaps only 400 or 500 generations ago. § 2 The students of languages (philologists) tell us that they are unable to trace with certainty any common features in all the languages of mankind. They cannot even find any elements common to all the Caucasian languages. They find over great areas groups of languages which have similar root words and similar ways of expressing the same idea, but then they find in other areas languages which appear to be dissimilar down to their fundamental structure, which express action and relation by entirely dissimilar devices, and have an altogether different grammatical scheme.[79] One great group of languages, for example, now covers nearly all Europe and stretches out to India; it includes English, French, German, Spanish, Italian, Greek, Russian, Armenian, Persian, and various Indian tongues. It is called the Indo-European or ARYAN family. The same fundamental roots, the same grammatical ideas, are traceable through all this family. Compare, for example, English _father, mother_, Gothic _fadar, moutar_, German _vater, mutter_, Latin _pater, mater_, Greek _pater, meter_, French _père, mère_, Armenian _hair, mair_, Sanscrit _pitar, matar_, etc., etc. In a similar manner the Aryan languages ring the changes on a great number of fundamental words, _f_ in the Germanic languages becoming _p_ in Latin, and so on. They follow a law of variation called Grimm’s Law. These languages are not different things, they are variations of one thing. The people who use these languages think in the same way.