In Phenomenological Reviews, Joeri Schrijvers reviews
David Farrell Krell's Phantoms of the Other: Four Generations of Derrida's Geschlecht
[L]et us track what Heidegger takes from Trakl: there would be (there would have been or there will be: this is what separates Derrida from Heidegger) one Geschlecht, one humanity (but Heidegger will exclude all Latinate words and things. Hence, Krell and Derrida note, there ‘will never have been’ oneness in the first place), that then receives a blow, and one becomes two: this is the male-female Schlag, a sort of twofold that is not yet conflictual. The conflict and the duel, Heidegger states, comes later (like the third party in Levinas patiently waits until the ‘ethical relation’ between the other and me has been dealt with) and then the Zwiefalt becomes Zwietracht: there will be men and women, friends and foes, families and tribes against other tribes. This, Heidegger will call, with Trakl, the “decomposition [Verwesenden] of the human Geschlecht” (Heidegger 1975: 50). Not so much ‘beyond essence’ but, as it were, ‘out of essence’.