But if even in the world of causes and metaphysical meanings we must presume the existence of natures and vocations manifesting a diverse degree of unitariness, we must also think that not all civilizations, and not all periods, offer the same possibilities of incarnation and expression to any of the forces that tend to an earthly form of existence. It is said that in every birth two different heredities interfere. The earthly and the historical gather, in a type of bond, certain biological, anthropological, and in part even psychological elements, a tradition, eventually also a caste, a given point in time and place in space, etc. Now, there are civilizations in which everything “is in order”, so to say, in which life, at its maximum, develops around a great unity and organicity of all these elements of “horizontal” heredity. Other civilizations are instead characterized by individualism, anarchy, the destruction of every limit, and every difference deriving from race, blood, caste, tradition, nationality. From what was said about the law of elective affinity and analogous correspondences that act in birth, obviously the civilizations of the former type are those that, in order to offer them circumstances and possibilities of adequate expression, attract unitary natures and pure and decisive forces. The chaotic civilizations of the latter type, for the same reason, will become instead, so to speak, the “exact place”, or the meeting place on earth, of every “otherworldly hysteric”.