With no delay, descent theory had found its critics. Many African tribal societies seemed to fit this neat model rather well, although Africanists, such as Paul Richards, also argued that Fortes and Evans-Pritchard had deliberately downplayed internal contradictions and overemphasized the stability of the local lineage systems and their significance for the organization of society. However, in many Asian settings the problems were even more obvious. In Papua New Guinea, the local patrilineal descent groups were fragmented and contained large amounts of non-agnates. Status distinctions did not depend on descent, and genealogies were too short to account for social solidarity through identification with a common ancestor. In particular, the phenomenon of cognatic (or bilateral) kinship posed a serious problem to the proposition that descent groups are the primary element behind the social structures of "primitive" societies.