The purpose of this paper is to clarify the principle of geography education for citizenship. In this paper, the author tries to analyze the textbook, 'Decision-Making Geography' developed by Norman Law and David Smith. The results of the analysis are as follows. 1) It is necessary for the students to take a critical thinking on the process of making policies rather than to participate in society through decision-making or problem-solving, in order to develop the basis of citizenship. 2) Objectifying decision-making could be distinguished from rational decision-making, in that the former mainly develops ability for pupils to think the process of decision-making critically without rational decision-making. 3) In geography lesson for objectifying decision-making, an investigation on the process of decision-making for issues or problems can be realized by analysing the actual process of making policies at the regional developments in the world. 4) A critical thinking on the actual process of decision-making can be realized by analysing consequences after decision-making through reflecting the process and by working out a solution.