such attempt will be made, or, if made, will be unsuccessful--a condition of mind which requires a more complete adaptation to the married state on the part of all concerned than can usually be secured. On the other hand, if no such exclusive privileges as are implied in the strict observance of the marriage bond are demanded or expected, there is no ground or occasion for the development of any high degree of jealousy. Monogamy, the strictest and most exclusive form of marriage, is thus most especially liable to bring jealousy in its train, since here all sexual tendencies and privileges are centred round one person, who has to be guarded at whatever cost against the advances of all other suitors[218]. [Sidenote: which differs in this respect both from preceding and succeeding ages] The Totemic age, characterised as it is by a recession in importance of the family ties as compared with those of a wider social unit, would appear then in one of its aspects to have been marked by a strong tendency to get rid of jealousy, together with certain other of the passions which are aroused in connection with, or centre round, the family. It differs thus from the more strictly monogamic condition, which, according to our most recent knowledge, would seem to exist among the really primitive races of mankind[219]. It differs also, perhaps even more markedly, from the conditions of the patriarchal family--that form of family which seems on the whole to be characteristic of the post-Totemic stage of culture[220]. At this latter stage the family--now however often in an enlarged form comprising several smaller family groups and several generations--once more becomes the predominant social unit; societies based on the tribal or clan system having apparently proved themselves more unstable or less capable of expansion and development than those based upon the more fundamental unit of the family. The decline of jealousy and of the hatreds based thereon was therefore, we may suppose, at the close of the Totemic age replaced by a recrudescence of that more vigorous hostility between father and son, mother and daughter, between brothers and between sisters, which is to some extent inevitable in a closely united monogamic family--a hostility which has continued to exist uninterruptedly until the present day. [Sidenote: Similar differences as regards other aspects of intra-family hatred]