Al-Faruqi's analysis, called the "Islamization of Knowledge: General Principles and Workplan" remains the primary source for this program. Nasr's work on the congruence between classical Islam and the modern ecology movement is thought by some to be even more fundamental, and to suggest parallels between the ethical constraints that secular activists seek to place on science and technology, and the ethical constraints that Islam sought to place on philosophy and politics. An Islamic ecotheology would then converge with economics and put Islamic pillars under a form of ecological economics, with religious authority backing up sustainable development.