Which one of the following is the most popular form of government in the contemporary world?

When we track the expansion of democracy all over the world in the last hundred years, we can confirm that democracy is the dominant form of government in the contemporary world. It does not face a serious challenger or rival. Yet our exploration of the various dimensions of democratic politics has shown us something else as well. The promise of democracy is far from realised anywhere in the world. Democracy does not have a challenger, but that does not mean that it does not face any challenges.