Book excerpt: Summary: It is crucial to understand that our progression through the twentieth century towards our contemporary global Crystal Palace (Peter Sloterdijk) of purity and transparency has been constantly accompanied by an almost physical desire for the pure, not just Mondrian's crystalline structures, but also the addictive taste of white sugar and white bread. This book investigates this urge for the pure, but also advocates a much deeper need for the impure, not to reinstate a new organicism, one more back-to-nature movement, but to trace that progression to a point where all modernist values reverse, where technology becomes an agent for the impure and the imperfect. Technology, long an agent for homogeneity and purity, is now turning into one for heterogeneity and global contingency.