Herman Dooyeweerd (1894-1977) remains one of the most pivotal figures in Reformed Christian philosophy, whose work offers a profound reorientation of how believers engage with the world of thought. This book presents a scholarly introduction to Dooyeweerd's Philosophy of the Cosmonomic Idea (or The Law-Idea), a system that challenges the dualisms and reductions of modern and postmodern thought by grounding every aspect of life in the Creator's sovereign law-order. Dooyeweerd's philosophy stands as a rigorous and uniquely Reformed response to the fragmented nature of contemporary thought. He posits that all spheres of human activity-be it science, politics, art, or ethics-are distinct yet integrally related, each governed by its own modal laws within a coherent, divinely-ordained structure. His work calls for a renewed understanding of the antithesis between the Christian and non-Christian worldview, insisting that the root of all theoretical thought must be a radical commitment to the Word of God. This expanded, academic publication by D. F. M. Strauss is an excellent guide for those familiar with Dooyeweerd and his philosophy.