Why did Muslims delay? Why do others come forward?

The reasons for the advancement of the Muslims were due in their entirety to the Islamic religion that had appeared new in the Arabian Peninsula and was filled with Arab tribes. With its guidance, they transformed from division to unity, from pre-Islamic times to civilization, and from worshiping idols to worshiping the One and Only One, and they conquered half of the earth in half. century, and had it not been for the dispute that had returned between them since the end of the caliphate of...