John (University of Pittsburgh, USA) Markoff 
Waves of Democracy : Social Movements and Political Change [PDF ebook] 
Social Movements and Political Change

Instead of presenting democracy as an ideal political system that humans only imperfectly realize, John Markoff conceptualizes democracy as something continually being reinvented. Instead of reducing democracy to well-defined and routine practices and institutions such as elections and parliaments, Markoff shows how political movements have repeatedly challenged and remade existing institutions. After reviewing two centuries of political conflict, he concludes with a thoughtful and exciting discussion on what democracy means today and what its future might be.