Of the intrinsic differences that separate Americans from English the chief have their roots in the obvious disparity between the environment and traditions of the American people since the seventeenth century and those of the English. The latter have lived under a relatively stable social order, and it has impressed upon their souls their characteristic respect for what is customary and of good report. Until the First World War brought chaos to most of their institutions, their whole lives were regulated, perhaps more than those of any other people save the Spaniards, by regard for precedent. The Americans, though partly of the same blood, have felt no such restraint, and acquired no such habit of conformity. On the contrary, they have plunged to the other extreme, for the conditions of life in their country have put a high value upon the precisely opposite qualities of curiosity and daring, and so they have acquired that character of restlessness, that impatience of forms, that disdain of the dead hand, which now broadly marks them.