“What we need is to replace the reified generalities with concrete assemblages: many bazaars, many regional trading areas, many national markets… each with a date of birth and (potentially) a date of death. The best way to deal with this problem is always to think statistically, dealing always with populations and with how variation is distributed in a population. Thus, the duality “male-female” can easily be eliminated if we take a large population and check how secondary sexual characteristics are distributed: all of them, except for the capacity to bear children, form two overlapping statistical distributions. The duality emerges when one ignores the zone of overlap and reifies the averages.”