To Schurtz, however, the concept of initiation is primarily associated with puberty. His argument is that puberty is a physiological stage through which every one must pass. The change to sexual maturity is so important a fact, that it cannot possibly have escaped any tribe. It follows that this physiological change must have been correlated with a change in the position of the individual in the tribe. He will, for instance, among other things, be less subjected to the influence of his mother, and more to that of his father, etc. All these general propositions are true; and it is also unquestionably true that there has been a marked tendency for ceremonies to cluster around that period of physiological change which we call puberty. Similarly, in some cultural areas there has been a secondary, or, if you wish, a constant association of puberty rites with a formal adoption into the tribe. In Australia, for instance, the individual does not become of active social importance until he has passed through certain rites at the age of puberty. The essential point, however, is whether he does not always become of active social importance at about that age. He unquestionably does. We cannot, therefore, assume offhand that it is the fact of puberty that is being emphasized by the initiatory rites. This would be the case only if we could prove that puberty is invariably associated with some form of initiation. If it is not, then we must regard the clustering of the concept of initiation around the age of puberty, among the Australians and other tribes, as a cultural peculiarity of these peoples.[28] In other words, the beginning of the social importance of an individual may be associated with puberty initiation rites. Initiation may, however, be associated with any period of development. For instance, among the Christians and Semites, it is found associated with birth in the forms of baptism and circumcision; and just as with any age, so it may become associated with any social or ceremonial unit. It can thus become associated with entrance into a society; and we may consequently say that a society is only one of the numerous cultural elements with which initiation has become associated.