"There is no Abstract art." Who said this ? Pablo Picasso himself. And he was serious. He even added :"You must always start with something."
In spite of Picasso's prophecies, Abstract art flourished after WW2 mainly because Communism and Fascism had forbidden it before the war ; it appeared then as the only symbol of freedom and free expression.
Abstract art conquered its independence and longevity on the ashes of Fascism and the stubborn narrowness of mind of the Soviet leaders who had abolished all artists groups and associations in 1932 and established the Union of Soviet Artists.
As soon as 1933 the Jubilee of Soviet Art even included a section "Degenerate Art" showing Russian Futurist, Suprematist and Constructivist works. The Nazis imitated this obnoxious policy in 1937 when they inaugurated the House of German Art in Munich.