....

A strong obligation to share out food in the horde (Radcliffe-Brown, 1930-31, p. 438; Spencer and Gillen, 1927, pp. 37-39).

Yir-Yiront exchange seems to parallel the Bushman scheme (above). Sharp notes that reciprocity varies on both sides of the set of customary kin dues, toward balance beyond and toward generalized reciprocity in the narrowest sphere of closest kin. Giving to persons outside the range of those entitled dues "amounts to compulsory exchange.... But there is also irregular giving, though within a relatively narrow social range, for which the incentives seem to be chiefly sentimental, and which may be considered altruistic;

this may lead to a desire to acquire property in order to give it away" (Sharp, 1934-35, pp. 37-38).