The examples I have alleged seem to me conclusive; their number, if necessary, might be increased to any extent. But the conviction has already gained ground, that these are but secondary evils, to which an undue importance has hitherto been attached, and that the law which governs the life and death of societies must be sought for elsewhere, and deeper. It is admitted that the germ of destruction is inherent in the constitution of communities; that so long as it remains latent, exterior dangers are little to be dreaded; but when it has once attained full growth and maturity, the nation must die, even though surrounded by the most favorable circumstances, precisely as a jaded steed breaks down, be the track ever so smooth. Degeneracy was the name given to this cause of dissolution. This view of the question was a great step towards the truth, but, unfortunately, it went no further; the first difficulty proved insurmountable. The term was certainly correct, etymologically and in every other respect, but how is it with the definition. A people is said to be degenerated, when it is badly governed, abuses its riches, is fanatical, or irreligious; in short, when it has lost the characteristic virtues of its forefathers. This is begging the question. Thus, communities succumb under the burden of social and political evils only when they are degenerate, and they are degenerate only when such evils prevail. This circular argument proves nothing but the small progress hitherto made in the science of national biology. I readily admit that nations perish from degeneracy, and from no other cause; it is when in that wretched condition, that foreign attacks are fatal to them, for then they no longer possess the strength to protect themselves against adverse fortune, or to recover from its blows. They die, because, though exposed to the same perils as their ancestors, they have not the same powers of overcoming them. I repeat it, the term _degeneracy_ is correct; but it is necessary to define it, to give it a real and tangible meaning. It is necessary to say how and why this vigor, this capacity of overcoming surrounding dangers, are lost. Hitherto, we have been satisfied with a mere word, but the thing itself is as little known as ever.[52] The step beyond, I shall attempt to make.