A strong belief in separation of government from society, and traditionally opposed to unity of state and religion too.

Islam as a whole, prior to Peak Colonialism (which obviously led to some serious cultural and social restructuring) Islam was big on society-religion being apart from government and power. Leave government alone and ignore it as much as you can to live well within society - Sharia as a social code for getting along, with more wiggle-room and freedom compared to medieval laws from governments or local elite.

Debt , pp. 220-225 has a lot more of Graeber on the matter and we can both check the bibliography for more in depth reading.