This Is My Faith - Al-fatlawi, Ali - الصفحة ١٧٥ - Words on Special Prophecy
Anwar: Does such a man have to rise to carry all this burden necessarily after injustice and corruption prevail?
Hasan: At the time of prophets and messengers, they are responsible for such burdens; after them, this responsibility is passed to their trustees. This is because the Almighty Allah always has someone representing the reason. It is part of His Divine Wisdom to send a prophet or a messenger when the world needs one. That is why Mohammad Bin Abdullah (PBUH) came with his sealing call to guide people and spread justice.
Anwar: Can we specify the date when the Islamic Call started according to Gregorian calendar?
Hasan: The Honorable Messenger (PBUH) began his call in early seventh century – in ٦١٠ A.D. – with his family and his tribe so they support his cause. Then, he spread his message to others, Arabs and non-Arabs. During this period, the prophet, his companions and his followers engaged in wars and conquests in order to exalt the name of Allah against the disbelievers. As a result, he successfully delivered his Divine message and spread his celestial call; this was around ٦٣٣ A.D. His disciples