The Arab world of the 11th century was in some respects comparable to that of the Roman Empire a millennium earlier. St. Paul was born at Tarsus, wrote in Greek, but he was above all a Roman citizen.
By common consent the literati as well as the politicians consider the Arab world as that area where Islam is the dominant religion and Arabic the language of State, albeit it may not be the street language. A present day physician residing in Pakistan, although ethnically unrelated to a man of Saudi Arabia, Egypt, or Lebanon would certainly consider himself a citizen of the Arab world as would your correspondent from Teheran.
Ibn Sina wrote exclusively in Arabic. His writings reflected the attitudes, philosophy, judgment, critical inquiry, and expanding frontier of classical learning as borne on the wave of Islam into 11th century Persia.
Napoleon Bonaparte was born in Corsica of Italian