It was the beginning of what climaxed in the "Degenerate Art" exhibition of 1937, the most important art event of the decade, for it was the largest single show of 20th-century avant-garde ... the ...

Arp’s abstractions, Schwitters’ constructions, Picabia’s targets and stripes and Duchamp’s readymades were soon turning up in the work of major 20th-century artists and art movements.