To+what+extent+was+Dar+al-Islam+a+unified+cultural+AND+political+entity?

Dar al-Islam unified politically and culturally? Politically: and ways of ruling Culturally: Trigonometry, and Algebra
 * Islamic World? Arabian Peninsula through Africa, Asia, and Middle East
 * Arab Muslims- taught administration- how to rule (Caliph)
 * political thought from Persians
 * Dar-Islam pretty unified politically because had strong diffusion of governments which led them to more efficient governments
 * had many sources of influence: Nomadic culture of Arabia, Persian culture, Indian culture, and Greek culture
 * Persians spread: language- the main cultural language, literature, new philosophies
 * Indians spread: Math- millet system (Arabs and West use), invent 0, three diciplines of math- Geometry,
 * Greeks spread: fundamentals of medicine, philosophers, science
 * Dar-Islam more diverse culturally; they were unified but received influences that made them become heterogeneous

Sources: The Princeton Review 2008 Edition, Mr. Delarme's notes