The 18th century faith in the detached, rational subject- along
  with its epistemological correlate: the objectively
  comprehensible universe- as a philosophical grounding for
  cultural, political, economic and technological application has
  lead to the creation of the prospect of Nuclear war and Global
  Warming, both means by which humans can potentially annihilate
  ourselves as a species.

  Now tell again what is a mental illness or not?