How did rule under the Abbasids dynasty impact the Muslim people?

With the rise of the Abbasids dynasty, its influence in the Muslim empire of the Caliphate expanded to other nations, concentrating on supporting the community of Muslim believers, even though they were not of Arab nationality. Much of the support for the Abbasids dynasty, coming from the Persians, had as a logical consequence that the Abbasids were responsible for many of the traditions of the Sāsānian government (who were Persians). Being supported by tolerant Muslims, it also allowed the Abbasids to recognize before the public opinion the Embryonic Islamic Law, and to base their dynasty on the religion of Islam.