In recent decades, the role that national supreme courts have played in shaping and determining institutional change has been studied from a number of angles. However, this vast literature has not produced a dynamic model that is capable of illuminating the impact of supreme courts on national policy or institutional change. This article proposes such a dynamic model using perspectives based on the 'shared mental model' and the concept of 'political entrepreneurship'. Adapting hypotheses from the neo-institutionalism literature, it develops a procedural model for analyzing how political rules are changed formally in a democratic system. The analysis also explores the political entrepreneur role that supreme courts play in developing institutional change and addressing social problems. This model is then used to study the Supreme Court in Israel.