Islamic Civilization

Is it true that there is currently no ideological Rival Awe to Western Liberalism other than Islamism? First of all, if such a thing were true, then that would be a very good reason to embrace Political Islamism. But it is only partly true. Instead it is mostly false both because it monolithizes Islamism and because it pretends not to see the Fourth Political Theory. And yet the Fourth Political Theory is the reason why this view is partly true.