The article analyses the various logics of different types of decision-making processes: war, strategic bargaining, deliberative negotiation, deliberation, voting, trial, investigation and subsumption. The logics specify relationships between decision situations or constellations of preferences, the character and results of the processes, and problems that may arise. Furthermore, the article presents typical decision-makers and arenas, the bases of legitimacy, and political systems where the respective forms of decision-making are dominant.