The lecture discusses the approach of political economy to constitutional design, starting from Hobbes-Locke-Montesquieu-Madison to modern scholars. This tradition stems from a particular socio-economic and intellectual tradition with many implicit assumptions, that is illustrated by several historical cases, for example, a model of constitutionalism in Colombia where the form of the constitution had to be adapted to the anticipation that people would not obey the rules. The speaker would also discuss Chinese constitutional history and show how it is predicted on very different assumptions than the Liberal-Democratic Tradition.