This handbook provides an overview on how to build a democratic constitution. It uses the framework of international law to anchor concepts of a democratic constitution, and focuses on a number of real-life challenges of constitutionalism, such as re-emerging authoritarian rule, rights of the opposition, and the challenge of implementing a democratic constitution. This resource is aimed at constitution-makers and the interested public everywhere. It intends to provide realistic, accessible and practical information for these constitution builders in their work on reforming or replacing their constitutions.