The core axioms of all progressive beliefs are anti-essentialism and finiteness. There is a tension between the two since essences are a form of finiteness, but it is a creative tension. Spinoza produced a top down ant-essentialism, almost like a many-worlds interpretation of all limited phenomena, but Hegelian idealism, or more broadly the family of idealisms in which Hegel's philosophy belongs provides a universal solvent for all essences based on the nature of consciousness itself: the knowing of any positive content is already its negation. All of this becomes seemingly inevitable in a thinking disciplines and gives them a leftwards drift. Biologism may be empirically essentialist, but remains embedded in metaphysical anti-essentialism. It also represents the broad road. There is narrow path runs apart from this, via Kierkegaard and Heidegger, but it is hard ad uphill, rarely travelled.