With the present volume, the presentation of Peirce’s philosophical thought reaches its metaphysical culmination. It embodies the effort of the founder of Pragmatism to develop a metaphysics which will conform to the canons of scientific method, and at the same time provide for real novelty, objective universal laws of nature, cosmical and biological evolution, feeling, and mind. To his previously published papers on chance, continuity, God, and other metaphysical themes, the editors have added a considerable number of unpublished manuscripts which clarify and develop the implications of Peirce’s fundamental world-view. The volume contains those speculative views of Peirce which so deeply influenced his contemporaries, including his discussions of tychism and synechism and of the religious aspects of metaphysics.