Whether despotism exists, as Mr. Kidd and his followers assume, among all the indigenous populations of the tropics, only a careful investigation of the subject would permit one to say. But that it must, as they contend, always exist there, none of the laws of social evolution gives the slightest warrant. Wherever it does exist, it had the same origin that it had in England, and in obedience to the same forces of peace and industry that operated against it in that country, it must pass away. The struggles between clans and tribes for the possession of desirable territory, or for the capture of food or slaves, or for the gratification of predatory and belligerent instincts, gave rise to the permanent chief, to the ruling hierarchy, and to all the other characteristics of a militant society. The degree of heat or humidity or the luxuriant vegetation of the tropics had no more to do with this political organization than the degree of cold, or the dryness of the atmosphere, or the comparative poverty of the soil of some of the Western States with the similar political organization of the Indians that roamed over them. None of these physical characteristics can prevent the play of those forces that drive people eventually to the adoption of that form of social organization that will best promote their happiness. As the social philosophy of evolution shows, the social organization best fitted for this purpose is the one where the largest individual freedom prevails. Since the abolition of slavery and serfdom and many other forms of despotism has been found necessary for the best interests of society in Europe, we have a right to believe that the abolition of the same forms of despotism will be found necessary for the best interests of society in the tropics.