"The twentieth century was a time of rapid globalization for advanced art. Artists from a larger number of countries made important contributions than in earlier periods, and they did so in a larger number of places. Many important innovations also diffused more rapidly, and more widely, than in...

"Non-representational painting was one of the most radical artistic innovations of the twentieth century. Abstract painting was created independently by three great pioneers - the experimental innovators Kandinsky and Mondrian, and the conceptual Malevich - virtually simultaneously, in the years...