aestheticism
noun /iːsˈθetɪsɪzəm/,  /esˈθetɪsɪzəm/
  /esˈθetɪsɪzəm/
(North American English also estheticism)
 [uncountable]- an approach to art and life based on the belief that art and beauty should be valued for themselves, not for a social or moral purpose