It would not be difficult to present from all history a mass of illustrations of this thesis wellnigh sufficient in themselves to establish it. And there is no doubt that the principles of human nature, which appear in those illustrations, can be set in such order as to prove the thesis beyond a question. The softness of Southern climates produces, in the long run, gentleness, effeminacy, and indolence, or passionate rather than persevering effort. It produces, again, the palliatives or disguises of these traits which are found in formal religions, and in institutions of caste or slavery. The rigor of Northern climates produces, on the other hand, in the long run, hardy physical constitutions among men, with determined individuality of character. It produces, therefore, freedom even to democracy in politics, protestantism even to rationalism in religion, and grim perseverance even to the bitter end in war. A certain stern morality, often amounting to asceticism, is imposed on Northern constitutions. So superficial is it, so much a creature of circumstance, that Norman, Scandinavian, Goth, or Icelander, deserves no sort of credit for it. All history shows that it vanishes before the temptations of any Vinland which the frozen barbarians stumble upon. None the less does it give them vigor of muscle, and power to endure hardship, which, in the end, tells, over the accomplishments of the most warlike Romans, Greeks, Persians, or other Southrons. "Fight us, if you like," said Ariovistus to Caesar; "but remember that none of us have slept under a roof for fourteen years." That sort of people are apt to succeed in the long run.