sophisticated - having or appealing to those having worldly knowledge and refinement and savoir faire; "sophisticated young socialites"; "a sophisticated audience"; "a sophisticated lifestyle"; "a sophisticated book"

uninterested - not having or showing interest; "an uninterested spectator"

unconcerned - lacking in interest or care or feeling; "the average American...is unconcerned that his or her plight is the result of a complex of personal and economic and governmental actions...beyond the normal citizen's comprehension and control"; "blithely unconcerned about his friend's plight"