Picasso reveals his most erotic year, Andreas Gursky predicts the post-truth era, O'Keeffe and Hopper hit Oxford – and the only way is Sussex for William Blake in our exhibitions preview
Get the new year off to an angry start with this exhibition about art, popular culture and protest. Peter Kennard's classic CND photomontages of the 1980s and a raw, intimate recording of The Internationale by Susan Philipsz are among the political artworks in a survey of how art is inspired by dissent, resistance and rebellion. Yet can protest art really change anything? The most pungent political art of modern times includes Picasso's Guernica and John Heartfield's anti-Nazi photomontages, but neither stopped Hitler.
• 6 January-15 April, Yorkshire Sculpture Park.