Studies of traumatized soldiers and the repetition compulsion led to the incorporation of this concept, far removed from sexuality. Melanie Klein included it in her account of the development of an early superego, claiming that it acts to generate infantile anxiety together with the birth trauma. This nihilistic tendency operates in opposition to Eros, the pleasure principle. For ten points, name 
Studies of traumatized soldiers and the repetition compulsion led to the incorporation of this concept, far removed from sexuality. Melanie Klein included it in her account of the development of an early superego, claiming that it acts to generate infantile anxiety together with the birth trauma. This nihilistic tendency operates in opposition to Eros, the pleasure principle. For ten points, name this concept, the natural desire to regress to a tensionless state of non-existence, which Freud referred to as Thanatos.
Studies of traumatized soldiers and the repetition compulsion led to the incorporation of this concept, far removed from sexuality.
{death instinct} or {death drive} (accept {Thanatos} before the end)