The prohibition against riba is a fundamental aspect of Islamic finance, and this alone sets it apart from conventional finance. However, it's not enough to say that Islamic finance is interest-free finance. There is more to it than that. The reason behind the prohibition against interest, and riba as it is broadly defined, is to remove injustice and inequality from financial matters. To do so, Shariah has stipulated some ethical guidelines to follow.
As mentioned in Chapter 6, when it comes to trade and finance, everything is permissible unless it is explicitly prohibited by Shariah, leaving the door wide open for financial creativity and for free markets to operate. Some of the other prohibitions include industries that Muslims must avoid because they conflict with the tenets of Islam and Shariah. These industries include the following: