If it has been necessary in some chapters to multiply unpleasant facts, the reader must blame the sentimentalists who have so persistently whitewashed the savages that it has become necessary, in the interest of truth, to show them in their real colors. I have indeed been tempted to give my book the sub-title "A Vindication of Civilization" against the misrepresentations of these sentimentalists who try to create the impression that savages owe all their depravity to contact with whites, having been originally spotless angels. If my pictures of the unadulterated savage may in some cases produce the same painful impression as the sights in a museum's "chamber of horrors," they serve, on the other hand, to show us that, bad as we may be, collectively, we are infinitely superior in love-affairs, as in everything else, to those primitive peoples; and thus we are encouraged to hope for further progress in the future in the direction of purity and altruism. Although I have been obliged under the circumstances to indulge in a considerable amount of controversy, I have taken great pains to state the views of my opponents fairly, and to be strictly impartial in presenting facts with accuracy. Nothing could be more foolish than the ostrich policy, so often indulged in, of hiding facts in the hope that opponents will not see them. Had I found any data inconsistent with my theory I should have modified it in accordance with them. I have also been very careful in regard to my authorities. The chief cause of the great confusion reigning in anthropological literature is that, as a rule, evidence is piled up with a pitchfork. Anyone who has been anywhere and expressed a globe-trotter's opinion is cited as a witness, with deplorable results. I have not only taken most of my multitudinous facts from the original sources, but I have critically examined the witnesses to see what right they have to parade as experts; as in the cases, for instance, of Catlin, Schoolcraft, Chapman, and Stephens, who are responsible for many "false facts" that have misled philosophers.