Traditional perceptions of centre parties stress their moderating factors, but their opposite tendency of contributing to party system polarization has generally been treated as if it were of lesser consequence. This study seeks to settle an age-old debate by claiming that what has become acceptable almost universally by political scientists, and has achieved the status of an axiom when politics are discussed, is dubious, if not outright incorrect. Examining this important aspect of European parliamentary democracies, this book reassesses the perception of centre parties as a force of moderation, arguing that the centre has the capacity to cause polarization. An examination of contemporary centre parties is provided to prove this maxim.