Both evolutionary scientists and anthropologists, who approach the phenomena from very discrepant points of view, have, in other words, reached the c… - Thomas Hylland Eriksen

The world is far too complex, and variation between societal types is too vast, for a categorisation dividing it into two mutually exclusive kinds of society to be meaningful. In addition, as argued above, one cannot once and for all draw the boundaries of a society. For this reason, it is more accurate to state that anthropologists study social life rather than saying that they study societies.

What characterises anthropological research today more than anything is the recognition of complexity; the world is complex, cultures are complex, communities are complex, and analytical strategies must acknowledge complexity.

As mentioned, no society has a prescriptive practice. The rules are always adjusted to fit the bumpy and contradictory world of experience. It must nevertheless be admitted that absolute rules exist everywhere. The incest prohibition exists in all societies, even if it has often been pointed out that it varies in its significance and compass; in some societies, it is limited to the kin we might call close family, that is, people with the same biological mother and father and their relatives in direct lines of descent; but usually half-siblings are included in the incest prohibition, and often the prohibition is extended to include what we might call more remote relatives.