Source : Webster's Revised Unabridged Dictionary (1913)

Humanitarianism \Hu*man`i*ta"ri*an*ism\, n.
   1. (Theol. & Ch. Hist.) The distinctive tenet of the
      humanitarians in denying the divinity of Christ; also, the
      whole system of doctrine based upon this view of Christ.

   2. (Philos.) The doctrine that man's obligations are limited
      to, and dependent alone upon, man and the human relations.

Source : WordNet®

humanitarianism
     n : the doctrine that people's duty is to promote human welfare
         [syn: {humanism}]