Inventing Abstraction, 1910-1925 is an exhilarating show. Highly recommended, even for people who know Modernism. It makes a persuasive case that music, books, architecture, and dance all participated in Abstraction. And it shows that MoMA is doing homage these days to artists it once neglected, like Malevich. The only sad part: so much creative energy in 1910-12, which feels eerily like our own time, was dissipated by war.