Political naturalism
Political naturalism is a minor political ideology and legal system which believes that there is a natural law, just and obvious to all, that crosses ideologies, faiths and personal thinking, that naturally guaranties justice. It is inspired by sociological naturalism, and scientific naturalism's belief that the precision of natural sciences can be applied to social sciences, and hence to practical social activities like politics and law.
It may be seen as a natural law-based version of legalism/constitutionalism, and it bears relation with many constitutional monarchies ended up including political naturalist laws, and Al-Sanhuri himself wrote the Syrian and Jordanian civil codes and the Kuwaiti commercial code.