Platonic universals received sympathetic attention at the turn of the century in the early writings of Moore and Russell. But this interest quickly waned with the empiricist and nominalist movements of the twenties and thirties. In this process of declining interest Wittgenstein's theory of family resemblance seemed to serve both as coup de grâce and post-mortem.
I propose, however, that family resemblance far from being an adequate refutation of Platonic universals can actually be accommodated within a Platonic theory properly conceived. But first for some caveats and qualifications.
What family resemblance actually succeeds in refuting is not Platonic universals but Aristotelian or empiricist, or, generally, abstractive or commutative, universals. An abstractive universal is a universal arrived at by induction from identical characteristics in numerically distinct individuals (thus, for instance, see Aristotle's Metaphysics 5.26, 1023b30-31). An abstractive universal is a common property and nothing else. This conception of a universal has several consequences. First, abstractive universals are ontologically dependent on particulars.