Religion and the Rise and Fall of Islamic Science Eric Chaney∗ May 2016 Abstract Why did the surge of scientific production in the medieval Islamic world dwindle? To explore this question, I gather data on intellectual production from Harvard's library collection and a catalog of books from seventeenth century Istanbul. I document that the proportion of books dedicated to scientific topics declined in the medieval period, noting that the empirical patterns are most consistent with theories linking the decline to institutional changes. I discuss the role religious leaders played in generating these developments, concluding that the evidence is consistent with the claim that an increase in the political power of these elites caused the decline in scientific output. ∗Harvard University,
[email protected]. This paper is a substantially modified version of a chapter of my dissertation written under the direction of Barry Eichengreen, J. Bradford DeLong, Edward Miguel, Bob Powell and G´erardRoland. I thank many individuals and seminar participants for helpful comments, conversations and suggestions. Laura Morse provided invaluable assistance obtaining the Harvard Library data and Yazan al-Karablieh provided able research assistance. Part of this project was carried out while the author was a member of IAS Princeton, a Mellon Fellow at CASBS Stanford and a Furer Fellow at Harvard, whose support is gratefully acknowledged. I am responsible for all remaining errors. 1 \O Lord! Increase me in knowledge" -Quran (20:114) \For indeed faith, with ignorance, is sound"1 -Muslim Religious Elite, 12th Century CE Muslim-majority regions produce a disproportionately small share of world scientific output today.2 During the medieval period, however, Islamic societies witnessed a spectacular flowering of scientific and technological production.