«It is important to note that depression is a very complex disease and also defined in the context
of modern human societies, so we certainly can't say that our ancestors or Neanderthals were depressed in the modern sense.
This means that
modern human societies can still respond to selection, and genetic differences between us continue to fuel evolution.
With images like these, the news from the Max Planck Institute in 2010 that the two species did interbreed and share DNA is quite believable and acceptable to
a modern human society whose belief in its uniqueness as a species is now uncertain.