The book studies the concept of maṣlaḥah (interest) in consideration of it being one of the most important objectives of the Sharīʿah. The author points out that the rules of Sharīʿah have come in their essence to help people both in the short and long term and to meet their interests and needs and to protect all the affairs of their lives. He also emphasises that the concept of maṣlaḥah pervades the whole of Islamic jurisprudence and that all means of arriving at rules use it.

Foundation work in this area