Art in the 70's was an age of degeneration...An example of this is "funk" music but especially the garbage junkyard kind of "funk", celebration of junkyards like bill cosby. Colors were odd mixes of oranges and browns...the 70's office. The worst of this was 70's porn mustaches and andy warhol garbage.
In the 70's it was a hypermasculine age, with excessive masculinity you get cultural decline, the paradigm was a GTA of men just running around doing jobs...They had the potential to build opulence, but just could care less.
2000's was hyperfeminine, feminine decadency and cowardice, with this you also get cultural decline, because they are too decadent to actually build anything of opulence.