Note 1 — An Essay on the Basque Language,

This contradiction, however, is only an apparent one. Thus, as Schleicher has demonstrated, languages are born, grow up, become stationary, decline and die; in a word, live after the same fashion as do organized beings. There are in every language two principal periods—that of formal development, during which the idiom passes from the first (monosyllabic) stage to the second (agglutinative) by reducing certain roots to a secondary and dependent office, then from the second to the third (inflectional) by a new effort to express simultaneously signification and relation; and that of formal decay, during which the original meaning of the relative affixes is more and more forgotten, they get worn out, change by degrees, and often end by perishing altogether. Formal decay begins when a language becomes historical, and it often gives rise to remarkable cases of regressive metamorphosis. One remark which we must make on this subject is that the known agglutinative languages have not spontaneously arrived at historical life—that is to say, have not commenced their decay, except under the influence of a foreign idiom either isolating or inflectional. Nevertheless, during their decay, languages can adopt fresh forms, but these are merely composed of words already in use; man in the historical period has no longer bare roots at his service.1