This article is a revised version of part of a paper presented at the XVIth World Congress of the International Political Science Association, August 21–25, 1994, Berlin. Among the numerous scholars and friends who provided inspiration as well as assistance, I would especially like to thank Haile Asmerom, Alan Doig, Hans van den Heuvel, Lex and Wim Huberts, Jan Kleinnijenhuis, Paul Pennings, Donnatella della Porta, Winfried de Valk, Bertjan Verbeek, Michiel de Vries and Marga Wijman.