Islamism is a range of religious and political ideological movements that believe that Islam should influence political systems. Its proponents believe Islam is innately political, and that Islam as a political system is superior to communism, liberal democracy, capitalism, and other alternatives in achieving a just, successful society. The advocates of Islamism, also known as al-Islamiyyun, are usually affiliated with Islamic institutions or social mobilization movements, emphasizing the implementation of sharia, pan-Islamic political unity, and the creation of Islamic states.