Online research in philosophy

Of all the thinkers of the century of genius that inaugurated modern philosophy, none lived an intellectual life more rich and varied than Gottfried Wilhelm Leibniz (1646-1716). Trained as a jurist and employed as a counsellor, librarian, and historian, he made famous contributions to logic, mathematics, physics, and metaphysics, yet viewed his own aspirations as ultimately ethical and theological, and married these theoretical concerns with politics, diplomacy, and an equally broad range of practical reforms: juridical, economic, administrative, technological, medical, and (...) ecclesiastical. Maria Rosa Antognazza's pioneering biography not only surveys the full breadth and depth of these theoretical interests and practical activities, it also weaves them together for the first time into a unified portrait of this unique thinker and the world from which he came. At the centre of the huge range of Leibniz's apparently miscellaneous endeavours, Antognazza reveals a single master project lending unity to his extraordinarily multifaceted life's work. Throughout the vicissitudes of his long life, Leibniz tenaciously pursued the dream of a systematic reform and advancement of all the sciences, to be undertaken as a collaborative enterprise supported by an enlightened ruler; these theoretical pursuits were in turn ultimately grounded in a practical goal: the improvement of the human condition and thereby the celebration of the glory of God in His creation. As well as tracing the threads of continuity that bound these theoretical and practical activities to this all-embracing plan, this illuminating study also traces these threads back into the intellectual traditions of the Holy Roman Empire in which Leibniz lived and throughout the broader intellectual networks that linked him to patrons in countries as distant as Russia and to correspondents as far afield as China. (shrink)

This chapter argues that the outbreak of the Protestant Reformation undermined the Christian consensus that unaided human reason could prove God’s existence. As a consequence the issue of the provability of God in principle gained new prominence and had to be addressed in the first instance before entering the discussion of specific proofs of His existence. On the basis of the answers given to the preliminary question of the provability of God’s existence, the chapter discusses eighteenth-century reformulations of a priori (...) and a posteriori arguments for the existence of God, as well as new directions taken by natural theology in the late eighteenth century. (shrink)

As one might expect, throughout his life Leibniz assumed an attitude of religious toleration both ad intra (that is, toward Christians of other confessions) and ad extra (that is, toward non-Christians, notably Muslims). The aim of this paper is to uncover the philosophical and theological foundations of Leibniz’s views on this subject. Focusing in particular on his epistolary exchange with the French Catholic convert Paul Pellisson-Fontanier, I argue that neither toleration ad intra nor toleration ad extra is grounded for Leibniz (...) in indifference toward the content of revealed religion. On the contrary, Leibniz remained convinced of the objective truth of the Christian religion as it is handed down by the millennia-old tradition of the truly universal church. In his view, reasons internal to the very nature of salvation and to the conception of God and man explicitly contained in or, at least, in accord with this tradition present religious toleration as the only justifiable answer to the differences among religions. (shrink)

Over the past decades a number of scholars have identified Johann Heinrich Bisterfeld as one of the most decisive early influences on Leibniz. In particular, the impressive similarity between their conceptions of universal harmony has been stressed. Since the issue of relations is at the heart of both Bisterfeld and Leibniz’s doctrines of universal harmony, the extent of the similarity between their doctrines will depend, however, on Bisterfeld and Leibniz’s respective theories of relations, and especially on their ontologies of relations. (...) This paper attempts to determine in more detail whether Bisterfeld’s ontology of relations contains at least the germ of the defining features of the ontology of relations later developed by Leibniz. It comes to the conclusion that, although Bisterfeld’s theory of relations is not as fully developed and explicit as that of Leibniz, it does contain all the key “ingredients” of it. (shrink)

This paper discusses Leibniz's Trinitarian doctrine in the light of his philosophy, as revealed by a set of virtually unstudied texts. The first part of the paper examines Leibniz's defence of the Trinity against the charge of contradiction as a necessary precondition to the development of his own conception of the Trinity. The second part discusses some of the key features of Leibniz's Trinitarian doctrine, notably his conception of person, the analogy between the human mind and the Trinity, and the (...) problem of Trinitarian relations. (shrink)

In this paper I will discuss certain aspects of Leibniz's theory and practice of 'soft reasoning' as exemplified by his defence of two central mysteries of the Christian revelation: the Trinity and the Incarnation. By theory and practice of 'soft' or 'broad' reasoning, I mean the development of rational strategies which can successefully be applied to the many areas of human understanding which escape strict demonstration, that is, the 'hard' or 'narrow' reasoning typical of mathematical argumentation. These strategies disclose an (...) 'other' reason, i.e. a complementary set of arguments and methods developed by Leibniz in order to deal with crucial issues such as the 'weighting' of probabilities and truths of fact. I will argue that one of the most compelling examples of the importance and fertility of Leibniz's 'other' reason is provided by his solution to the problems posed by the unique epistemological status of theological mysteries. (shrink)