This book explores the 'peace by democracy' hypothesis and applies the results of that search to the European security environment. Questions addressed What do we know about democratic peace and how do we explain it? How and to what extent is democracy connected to variables as economic interdependence, international trade, prosperity, state autonomy and peace? Will anarchy prevail again or will the pacifying impact of stable democracy preserve the peace in Europe despite some worrying signs that the end of the Cold War was not without its de-stabilising effects? It aims at academics, professionals, and students with a keen interest in international relations and European studies. It is very useful as a resource or textbook for undergraduate and graduate students.