Liberal orders are open to difference, pluralism and disagreement. Compared to a wide range of historical antecedents and contemporary competitors liberalism is inclusive. But liberalism also imposes limits on the kind of difference, pluralism and disagreement that is deemed legitimate. In that sense, liberalism is also exclusionary. In a series of colloquia and articles, this project explores the boundaries of liberalism with regard to it inclusionary and exclusionary dimension, focusing on basic constitutional doctrines (e.g. the limits of constituent and amendment power, militant constitutionalism and the right to resist) and its construction of legitimate authority.