We come now to the frontiers of the white world--to its true frontiers, marked, not by boundary-stones, but by flesh and blood. These frontiers are not continuous: far from the European homeland, some run in remote quarters of the earth, sundered by vast stretches of ocean and connected only by the slate-gray thread of sea-power--the master-talisman which the white man still grasps firmly in his hand. But against these race-frontiers--these "inner dikes"--the rising tide of color has for decades been beating, and will beat yet more fiercely as congesting population, quickened self-consciousness, and heightened sense of power impel the colored world to expansion and dominion. Above the eastern horizon the dark storm-clouds lower, and the weakened, distracted white world must soon face a colored peril threatening its integrity and perhaps its existence. This colored peril has three facets: the peril of arms, the peril of markets, and the peril of migration. All three contain ominous potentialities, both singly and in combination. Let us review them in turn, to appraise their dynamic possibilities. First, the peril of arms. The military potencies of the colored races have been the subject of earnest, and frequently alarmist, speculation for the past twenty years, particularly since the Russo-Japanese War. The exciting effects of Pan-Islamism upon the warlike peoples of Asia and Africa have been frequently discussed, while the "Yellow Peril" has long been a journalistic commonplace.