Ours is an era when human genes can be copied and patented. From genetically modified foods to digital piracy, the concept of intellectual property (IP) and the laws upholding it play a foundational role in our society, but its political and ideological dimensions have rarely been understood outside of specialist circles. This collection cuts through the legal jargon that so often surrounds IP, to provide both a comprehensive history and analysis that explores the corporate interests that shape its conception and the movements that are developing alternatives. As the nature of industry changes, we might ask: what are the wider implications of the concept of IP, be it for agribusiness and pharmaceutical companies or the film and music industries? Has IP law has been used to safeguard and assert the ownership of ideas and creativity, or is it an essential foundation of our culture? Today, with mounting challenges from the growth of free software and open source movements, this collection provides an accessible and alternative guide to IP, exploring its significance within the wider struggle between capital and the commons.