I didn't know there's a difference between Modern Art and modern art. I think both refers to the the time period. Modern art is not really a movement. I remember taking an art history class called modern art, which basically covers art work from 1800 until 1970s. Abstract expressionism is included in the modern art period, which originated with Kandinsky. The idea got introduced in the USA, and started the New York School of Art. The imagery associated with abstract expressionism basically continues until now, but I think in a degenerative way. Klimt is just from a whole different movement apart from all the obsession with abstraction. Everything after 1970s is called Contemporary Art or Post Modern Art. I think Contemporary Art is not a movement either, it is more of a time period. What I have against is Contemporary Art, which I think most of them have nothing to get.