Sunni Islam, like Shiʿite Islam, developed in stages. As a religious system, Sunni Islam is built around the idea that the earliest period of Islam was a golden age. Historically speaking, however, Sunni Islam can be identified with a process by which certain Muslim scholars, the ulama, became recognized as the rightful interpreters of Islamic law and when Muhammad's conduct, or sunna, was recognized as a source of revelation along with the Qurʾān.