Stein Rokkan was one of the leading social scientists of the post-war world. He was a prolific writer, yet nowhere is his contribution to social science - the conceptual and developmental map of Europe - presented in an integrated and systematic way. Stein Rokkan had plans to do this but died before the work could be started. Drawing on Rokkan's published, unpublished, and translated writings, this book systematizes and integrates Rokkan's numerous writings in the way he wanted to do himself.