noun

moral or cultural decline as characterized by excessive indulgence in pleasure or luxury.

he denounced Western decadence

dissipation,dissoluteness,degeneracy,debauchery,corruption,depravity,loucheness,vice,sinfulness,perversion,moral decay,immorality,lack of morals,lack of principles,lack of restraint,lack of control,lack of self-control,immoderateness,intemperance,licentiousness,wantonness,self-indulgence,hedonism,epicureanism,sybaritism,voluptuousness