Kaprow Art Which Can't Be Art

In this reading, the writer talks about a question what is art?  When we talk about the art, most of the popele will think the art is which has lots of intension, design and culture background. For examples, some oil painting in the gallery , and the artustic carve in the public area. Those above are art. However, the more and more the work of arts are " wearing" and "decorating" the tile of art right now. We  put  a lot definition to the art, so that we also judge what is the art by our own or common standards. This current trend is making people try to put "art" that others' thinking to their own art to let people think it is art to get an identity. The auther, think art can be everything even if it is very simple. But it is something come from something about that person's own pure thinking  without the thiking which wanna to make it look like art. Like auther, he thinks the art is when he is brushing his teeth, because it comes from his real life, it reflection and recording of the life and his thinking about life. That is life. This is art.

I think everything contains your own thinking anf feeling can be the art. No matter is it artustic. My  question is about what is Hellenisitic period? I googled it is about greek culture though.