Drawing on primary sources made available to scholars only after the archives of the Holy Office were unsealed in 1998, Negotiating Darwin chronicles how the Vatican reacted when six Catholics—five clerics and one layman—tried to integrate evolution and Christianity in the decades following the publication of Darwin's Origin of Species. As Mariano Artigas, Thomas F. Glick, and Rafael A. Martínez reconstruct these cases, we see who acted and why, how the events unfolded, and how decisions were put into practice. With the long shadow of Galileo's condemnation hanging over the Church as the Scientific Revolution ushered in new paradigms, the Church found it prudent to avoid publicly and directly condemning Darwinism and thus treated these cases carefully. The authors reveal the ideological and operational stance of the Vatican and describe its secret deliberations. In the process, they provide insight into current debates on evolution and religious belief.