Sunni Islam, the largest Islamic denomination, upholds the sunna—Muhammad’s practices—and acknowledges the first four caliphs as legitimate leaders. It bases its legal rulings on the Quran, hadith, and scholarly agreement, with four principal schools of thought. Authors such as Clyde Mark highlight its rejection of any divine human figures beyond Muhammad, while the CIA points to its organized legal framework and 85% global adherents.
J. C. Young observes the symbolic function of the Caliph, and Theodore Lunt emphasizes its lasting impact. The 1911 Encyclopædia Britannica outlines its geographic prevalence. Sunni Islam’s established traditions and focus on orthodoxy define its position as the dominant force in the global Muslim community.