▁ 7 th ▁century ▁CE . ▁Islam ▁is ▁based ▁on ▁the ▁unity ▁of ▁all ▁religious ▁philosoph ies ▁and ▁accepts ▁all ▁of ▁the ▁Abraham ic ▁proph ets ▁of ▁J uda ism , ▁Christian ity ▁and ▁other ▁Abraham ic ▁relig ions ▁before ▁Muhammad . ▁It ▁is ▁the ▁most ▁widely ▁pract iced ▁religion ▁of ▁S out heast ▁Asia , ▁North ▁Africa , ▁Western ▁Asia , ▁and ▁Central ▁Asia , ▁while ▁Muslim - major ity ▁countries ▁also ▁exist ▁in ▁parts ▁of ▁South ▁Asia , ▁Sub - S ah aran ▁Africa , ▁and ▁S out heast ▁Europe . ▁There ▁are ▁also ▁several ▁Islam ic ▁republic s , ▁including ▁Iran , ▁Pakistan , ▁Maur it ania , ▁and ▁Afghan istan . ▁ ▁Sun ni ▁Islam ▁is ▁the ▁largest ▁den om ination ▁within ▁Islam ▁and ▁follows ▁the ▁Q ur ' an , ▁the ▁ah ad ith ▁( ar : ▁pl ural ▁of ▁Had ith ) ▁which ▁record ▁the ▁s unn ah , ▁whilst ▁placing ▁emphas is ▁on ▁the ▁sah ab ah . ▁ ▁Sh ia ▁Islam ▁is ▁the ▁second ▁largest ▁den om ination ▁of ▁Islam ▁and ▁its ▁ad her ents ▁believe ▁that ▁Ali ▁succeeded ▁Muhammad ▁and ▁further ▁places ▁emphas is ▁on ▁Muhammad ' s ▁family . ▁ ▁A hm adi y ya ▁ad her ents ▁believe ▁that ▁the ▁await ed ▁Im am ▁Mah di ▁and ▁the ▁Prom ised ▁Mess iah ▁has ▁arrived , ▁believed ▁to ▁be ▁Mir za ▁Gh ul am ▁A hm ad ▁by ▁the ▁A hm adi . ▁ ▁There ▁are ▁also ▁Muslim ▁rev ival ist ▁movements ▁such