The principle that human beings are born free and slavery is accidental is accepted by all the scholars of Islam. Few important consequences of this principle are:
• Voluntary slavery is not allowed. A free person cannot become a slave even if he wants to.
• A free person cannot be enslaved. The interesting point is that Muslim theologians did not decide it, but the Prophet of Islam, Muhammad, may the mercy and blessings of God be upon him, declared it to be a sin 1400 years ago. He said, “There are three types of people against whom I shall myself be a plaintiff on the Day of Judgement. Of these three, one is he who enslaves a free man, then sells him, and consumes this money.”