This book revisits four early-modern debates of Reformed theology concerning the will of God. Reformed scholasticism advocated a particular relationship between divine knowledge, will, and power, which was altered by Jesuits, Remonstrants, Descartes, and Spinoza. In all these debates modal categories like contingency and necessity play a prominent part. Therefore, these positions are evaluated with the help of modern modal logic including possible world semantics. The final part of this study presents a systematic defense of the Reformed position, which has been charged of theological...