In accordance with the distinction made by embryologists with regard to the egg between the stimulus and the organizer, parents are stimuli having an indifferent value that trigger the allocation of gradients or zones of intensity on the body without organs: it is in relation to the parents that in each case wealth or poverty will be situated, the relative richest or poorest, as empirical forms of social difference so that within this difference the parents again appear, allocated to such and such a zone,