Prophethood is not unknown to heavenly revealed religions, such as Judaism and Christianity. In Islam, however, it has a special status and significance.
According to Islam, God created man for a noble purpose: to worship Him and lead a virtuous life based on His teachings and guidance. How would man know his role and the purpose of his existence unless he received clear and practical instructions of what God wants him to do? Here comes the need for prophethood. Thus God has chosen from every nation at least one prophet to convey His Message to people.
Prophets are necessary for conveying God’s instructions and guidance to mankind. We have no way of knowing why we were created. What will happen to us after death? Is there any life after death? Are we accountable for our actions? These and so many other questions about God, angels, paradise, hell, and more, cannot be answered without direct revelation from the Creator and Knower of the unseen. Those answers must be authentic and must be brought by individuals whom we trust and respect. That is why messengers are the elite of their societies in terms of moral conduct and intellectual ability.