Weiss, A. (1986). The Historical Debate on Islam and the State in South Asia. In Islamic Reassertion in Pakistan (21). New York: Syracuse University Press.

The four sunni schools of thought that have survived are Malikite fiqh, Hanafi fiqh, Shafi fiqh, and Hanbali fiqh. What makes them different from each other? Their approach to man-made interpretations of the Quran. Each school either allows ijma (analogical deduction) or qiyas (collective reasoning) or both or none.

Click on this to access the PDF: Sunni Schools of Thought. Learn which school allows which man-made interpretation(s) and find out where they are prevalent.