In this book the author proposes that parties are indispensable to modern politics and that the absence of parties suggests that a system is governed by a traditional elite which has yet to come to terms with the modern world. Without them it would be impossible to legitimize modern systems, to engage the loyalty and support of the citizens. The alternative to party rule is either aristocracy or violent repression. In all systems the party widens the area from which political leaders are recruited and is thus a 'democratising' if not necessarily a 'liberalising' force.