Extremism = contemporary. I do not see how you could get nearer to the meaning of contemporary than that. Although one thinks of extremism as something perpetually moving forward (violently progressing), that is an illusion. Extremism may be some inconsequential movement, just enough to create the illusion that something is happening, although in reality nothing is happening. In both sculpture and painting, when extremism has been standing still for two or three decades, it gets to look more and more academic, less and less extreme. It will only be when that childish sport is abandoned that something really new will appear in the visual arts.