Post-egoism is a philosophy emerging from the schools of post-modernism and Buddhism that aims to transcend traditions of artistic egoism, ethical egoism, and notions of an autonomous self. It takes a holistic approach towards being human and like any other genre or designation, retroactively applies to many past artists and thinkers (as for example, and ironically, Friedrich Nietzsche with his concept of the Übermensch- and in extension, theorists of posthumanism).
The term appears to have been coined in The University in Transformation by Jennifer Gidley:
Joining the ranks of initiators and supporters of the humanversity movement were many of the previously retrenched and disenfranchised academics, professionals, and activists. Having worked through their own resultant personal crises and angst at having to wear the ‘marginal crown,’ and then being catapulted into premature paradigm shift and spiritual transformation, they began to network with others and form sort of ‘post-egoism’ communities