FIRST §: AN AUTHOR, SUCH AS MYSELF, can only be grateful when a leading historian of Arabic science takes one of his books so seriously as to write a long review article on it. Professor George Saliba calls The Rise of Early Modern Science: Islam, China and the West “a refreshing and welcome contribution” to the field “documenting . . . a whole array of the achievements” of Arabic/Islamic (and Chinese) science in the ongoing project of modern science (143, 144). At the same time, Professor Saliba raises a host of issues, not all of equal importance, nor even connected to the main thesis of my book. In this reply, I shall present my comments under four headings with the intention of making the themes and thesis of my book evident to the reader. These headings address the main issues raised in Saliba’s essay, namely, the nature of ‘modern’ science, the possibility that economic factors have played a significant role in its rise, innovation in Arabic/Islamic astronomy after Ibn al-Shatir and the fourteenth century, and the nature and role of free inquiry.