It is nearly impossible to state the specific ideas behind abstract art, because everyone, including every abstract artist, has different ideas about exactly what abstract art is. For some it is...
Cubism was definitely a major art movement. Starting in 1907, cubist artists like Picasso influenced later art movements from Futurism to Precisionism.
Expressionism sought to express the meaning of "being alive" and emotional experience rather than physical reality. It is the tendency of an artist to distort reality for an emotional effect; it is a...