There is one thing about a moral ideal which sets it apart from all other ideals. It possesses a unique dynamic force. All ideals, it is true, have in them the impulsion to their embodiment in reality. But in a moral ideal there is the added imperative of conscience. There speaks from it the majestic voice of duty, demanding that the ideal be made actual in the life of the individual and of society. It is this that has made moral ideals such molding and constructive forces in history. [Sidenote: Composite moral ideals or types] There is a striking analogy between the different types of moral character and the different types of human beauty. Thus corresponding to the great types of masculine and feminine beauty there are masculine and feminine types of moral excellence. And then, just as the elements of the two chief types of feminine beauty, the blond and the brunette, combine to form a great variety of mixed or composite types, so do the elements of the chief types of goodness blend into many composite types of character.[14] There is no more instructive chapter in the history of morals than that which has to do with the formation of these composite ethical types, since these are often the most significant results of those great race collisions and comminglings which make up so much of the history of the past; for when races meet and mingle they blend not only their blood but also their consciences. There appears not only a new physical man but also a new moral man. Thus the fusion of races in Europe has resulted in a great fusion of moralities. The conscience of Europe is a very composite one, including Greek, Roman, Hebraic, Celtic, Gothic, and Slavonic elements. This heterogeneous conscience, so different, for instance, from the comparatively homogeneous conscience of ancient Egypt and of China, has been the most important factor in the life and civilization of the European people. It is largely because Europe has been constantly getting a new conscience that its history has been so disturbed and so progressive, just as it is largely because China has had the same Confucian conscience for two thousand years and more, that her history has been so uneventful and unchanging. [Sidenote: Causes which determine and which modify the moral type] Though every race and every age, since man is by nature a moral being, must have some type or standard of moral goodness, still the cast and content of this type is determined by a great variety of circumstances, such as the stage of intellectual development, the physical environment, social and political institutions, occupation, and speculative and religious ideas.[15]