What Russell's paradox tells us concerning realism (like cladistics)

Russell's paradox tells us that realism (ie, assuming that classes are real), like cladistics, is bound to end up in Russell's paradox. Classes are simply fundamentally paradoxically contradictory by being orthogonal.

Together, all of us have thus led realists to their ultimate Waterloo, ie, cladistics, by encouraging subjectivity. The process can be comprehended as a reaction against the scientific revolution, which, thus, surprsingly for realists, ends in a paradox. The scientific revolution thus has not been falsified, but just overturned by a movement that ended in paradox.

This is the situation we're in right now.