The principles of the Islamic system of government were laid down in the light of the Constitution of Medina given by the Prophet Muhammad ﷺ and the system of the Rightly-Guided Caliphate. In this book, the Constitution of Medina has been reviewed to the best of its ability in a modern way, in comparison with modern constitutional principles, according to the needs and requirements of the present age. Furthermore, it has also been made clear to the Western world that the Islamic political system is neither rigid nor excessively flexible, but this system based on moderation is a workable guarantor of human welfare system for every human being of every time and place till the end of time. In this book, 63 articles are included under the modern constitutional terminology of the Constitution of Medina.