You could make a long list but it might include things Like the capacity for language and higher thought or abstract thought, conscience, self-control, free-will.
Maybe the only way Newtown never leaves our conscience and fades away like Aurora or Columbine is if we have to look at the results of the tragedy to ensure that this moment leads to a transformational movement.
Republicans betrayed their own conscience when they went against established Republican principles like the MANDATE over healthcare which was a Heritage foundation issue popularized by Gingrich.