 The media theorist Ned Rossiter has called this approach a 'micro-empiricism', and sees it as derived from the work of the philosopher Gilles Deleuze.In 2004 Wark published her best known work, "A Hacker Manifesto".Here Wark argues that the rise of intellectual property creates a new class division, between those who produce it, whom she calls the hacker class, and those who come to own it, the vectoralist class.