Today, it is still possible to set up an authority to act as a guide to all Muslims. In the Qur'an, Allah orders all Muslims to obey "those in command among them." (Qur'an, 4: 59). Now, the methods used to select "those in command" can be altered according to the requirements of the age (such asappointment or popular vote). Thus is possible to establish an Islamic Union and a central Islamic authority, based on democratic principles and the supremacy of law, which should do a number of things.