4. It is becoming clear that every race is a composite of several races. Ethnological data show that the five grand divisions of the human race may be subdivided into racial stocks, and into races and sub-races, until more than 600 races may be described; and furthermore, that each of the 600 or more races represents an amalgamation of at least three or four races. It is evident that no clear line of racial demarcation can be drawn, and that purity of race may be a fictitious term. 5. Intermarriage of the representatives of races belonging to similar racial stocks seems advisable--according to the ethnologist. Pure bloods apparently die out. The strongest races today are those in which amalgamation has taken place recently--that is, within one thousand or two thousand years, for example, the English, or the Scotch-Irish. A mooted question of world importance relates to the intermarriage of the representatives of races widely different, such as the white and the yellow races, or the white and the black races. No race has yet developed out of such combinations. Race prejudices and social distinctions have produced conflicts which thus far have prevented the formation of such a race. Very few scientific data are available regarding miscegenation. Apparently, the interbreeding of whites and blacks leads ultimately to the elimination of the racial characteristics of the blacks and to the complete dominance of the whites. There are some writers who assert that this process takes place to the gain of the lower race and to the loss of the higher race. The last-mentioned point has not yet been proved. Miscegenation between whites and blacks occurs under such abnormal and vicious social conditions that the racial tendencies are definitely obscured. 6. Conflict between races is primordial; conflict between races today is illustrated in national wars and race persecutions. Weaker races have often combined against a stronger race; from these experiences there has come a growing sense of the value of co-operation. Nations with high moral principles have united against a powerful neighbor nation with bullying tendencies. Out of these temporary combinations there has arisen a sense of need for permanent forms of national co-operation. This common need will ultimately lead, undoubtedly, to a permanent association of nations. The conflict between the grand divisions of the human race will probably continue for a long time to come. Sometimes it is concentrated in an antagonism between the white and yellow races; and again, it is expressed in the more fundamental struggle between Occidentalism and Orientalism.