From what has been argued, it should now be apparent how Heidegger's philosophy of the affect, its ontological disclosures and its relation to authenticity might be enlarged to meet certain marxist challenges. The most valuable instruction to be gained from these citicisms, I think, is that which Lukacs offers in the example of Szilasi's intuition of co-presence. Traditional phenomenology needs to enrich its investigations into the social and historical reality of situation. Kosik's point that Heideggerian authenticity lacks the crucial third step (revolutionary change of society) is also profound but again, not incompatiblein se with Heidegger's concept. Alternatively, one might as easily say that Critical Marxism or any Marxist Humanism can still be enriched by certain Heideggerian insights.