Does Madison's belief that separation of powers is necessary to prevent tyranny necessarily require a presidential system or even judicial review? As I pointed out, this reading makes Madison silly, or at least a casualty of historical developments, since almost all other democratic countries have rejected the first and some the second. Of course, like all others of his time Madison had to make judgments about constitutional arrangements with very little directly relevant historical experience to go on. Hindsight gives us the advantage of nearly two centuries of later experience, during which most of the stable democracies adopted a parliamentary system, only a few chose a presidential system, and none adopted the American presidential system.