 A number of debates have centered on the question of what kinds of representative systems are best for a democratic society. What choice we make here will depend heavily on our underlying moral justification of democracy, our conception of citizenship as well as on our empirical understanding of political institutions and how they function. The most basic types of formal political representation available are single member district representation, proportional representation and group representation. In addition, many societies have opted for multicameral legislative institutions. In some cases, combinations of the above forms have been tried.