A fascination with the primitive lies at the heart of some of the most influential developments in Westem art produced between 1890 and 1950 - a time that witnessed both the heroic period of modern art and the apogee and decline of the West's colonial power. Many groups have been labelled primitive, including the so-called tribal peoples from Africa, Oceania and North America, but also prehistoric cultures, European peasants, the insane and children...