Without of course adopting a Platonic metaphysics, the
eighteenth-century philosophes were Grecophiles who regarded the
Athenian philosophers as their intellectual forbearers and mentors. So
powerful was their identification with c1assification that ancient ideas
were taken as keys to the design of the modem world, but usually the
ideas were taken separately and as divided from their systematic
context. The power of number was an idea the En- lightenment thinkers
deployed with their legendary passion and vigor, particularly as an
instrument for social reconstruction. It is no exaggemtion to say that
the role of quantities in contemporary social scientific theorizing
cannot be understood with any depth absent a recollection of the
philosophes' axial development of the notion of quantification. It is a
commonplace that for the philosophes progress required releasing human
abilities to have power over nature. Aprerequisite for this power was
knowledge of the underlying causes of natural events, knowledge that
required quantitative precision. Enlightenment thinkers were
sufficiently aware of themselves as products of their time to appreciate
the importance of a liberal social environment to the knowledge
enterprise; the supposition that the reverse is also the case, that
enhanced knowledge could advance social conditions, came easily.