Francis Schussler Fiorenza is one of the pivotal contemporary Roman Catholics working in the field of systematic theology and has made vital contributions to the discipline. This book - the first of its kind - provides an overview of Fiorenza's theological biography, from early influences and original insights to a comprehensively systematic project to reconstruct the foundations of theology, and explicates the major contours of Fiorenza's vital contributions to theological method, foundational, systematic and constructive theology, and the practical function of religion in society and politics. As the author argues, Fiorenza's vision is one of unrivaled clarity and coherence; even more, it follows a path of the shifting patterns in theology over the past half century, thus shedding light upon the internal constitution of recent Catholic and Protestant theology.