Introduction -- A very short history of the German anti-nuclear movement and a few of its groups -- A method of sequential analysis -- Consensus building in meetings: specifically vague proposals and changes in footing -- Endangered consensus? From disagreements to conflict avoidance -- How groups assess and revise tactics: the styles of being critical and thinking small -- Decision-making in a complex campaign: a confrontation of styles and struggle with key expressions -- Crisis and continuity: styles and group development over time -- Conclusion: styles and group relations to the environment