﴿وَلَوْ شَاءَ رَبُّكَ لَجَعَلَ النَّاسَ أُمَّةً وَاحِدَةً ۖ وَلَا يَزَالُونَ مُخْتَلِفِينَ﴾
118. And if your Lord had so willed, He could surely have made mankind one Ummah [nation or community (following one religion i.e. Islâm)] but they will not cease to disagree.