moralism

noun3

1. •
   The act or practice of moralizing (making moral reflections or judging the morality of others).

   • The Romantic movement […] struggled for ‘art for art’s sake’ against the old moralism and didacticism […] — 1937
2. •
   A maxim or saying believed by the speaker to embody a moral truth; an instance of moralizing.

   • There was a delicious spice of worldliness in the topics of conversation which was quite refreshing to him, accustomed as he was to the somewhat droning moralisms of his “congenial friends.” — 1859
3. •
   (old-fashioned) Religious practice that focuses on morality while placing little emphasis on doctrine or the metaphysical; adherence to a system of morality with little or no reference to religion.