What is the theme in Survival in Auschwitz by Primo Levi?

Levi frequently considers the inadequacy of normal language to describe existence within the concentration camp but does not stop from describing the brutal moral compromises required for existence. The war of survival required that one cast off the trappings of one's prior life and accept the new situation as real—many were not able to make the adjustment and were entirely defeated within days or weeks of their arrival.