Source : Webster's Revised Unabridged Dictionary (1913)

Moderatism \Mod"er*a*tism\, n.
   Moderation in doctrines or opinion, especially in politics or
   religion.

Source : WordNet®

moderatism
     n : a political philosophy of avoiding the extremes of left and
         right by taking a moderate position or course of action
         [syn: {centrism}]