This book is a defense of modal realism; the thesis that our world is but one of a plurality of worlds, and that the individuals that inhabit our world are only a few out of all the inhabitants of all the worlds. Lewis argues that the philosophical utility of modal realism is a good reason for believing that it is true.

The possible existence of extraterrestrial life led in the eighteenth century to a heated debate on the unique status of the human being and of Christianity. One of those who discussed the new scientific worldview and its implications for theology was the Swedish natural philosopher and theologian Emanuel Swedenborg. This article discusses Swedenborg's astrotheological transformation, his use of theological arguments in his early cosmology, and his cosmogony that later on ended up in his use of contemporary natural philosophy in his (...) theology, especially concerning the question of the plurality of worlds. I will first sketch the astrotheology found in his natural philosophical works, and then turn to the astrotheology of his later spiritual teachings. In Swedenborg's works we find teleological arguments and a stress on the universality of the divine creation and Christianity, as well as anthropomorphic descriptions of extraterrestrial life. By reconciling contemporary astronomical ideas, among others the concept of the plurality of worlds, with Christian dogmas, Swedenborg refuted deistic conclusions that Jesus was merely a mortal, while at the same time keeping his belief in the modern astronomical worldview. (shrink)

This essay proposes an alternative reading of David Lewis’s On the Plurality of Worlds (OpW) by drawing parallels between this book and a performance by Andy Kaufman, Andy Wrestles the Ladies (AwL). The proposed reading is ultimately grounded by a joke: that it is more credible to believe that similarly to Kaufman in AwL, Lewis impersonated a character in OpW by performing a reductio ad absurdum than to believe that he seriously defended modal realism. After all, to support (...) this thesis is to face countless objections while showing varied lacks of awareness and justifying the attribution to oneself of Ostrichist. The latter abbreviates the predicate, “to act like an ostrich,” attributable to that which lacks varied kinds of awareness in acting in a way comparable to that of a bizarre ostrich that buries its head in the sand for no good reason. (shrink)

Astronomers of the first half of the nineteenth century viewed our solar system entirely differently from the way twentieth-century astronomers viewed it. In the earlier period the dominant image was of a set of planets and moons, both of which kinds of bodies were inhabited by intelligent beings comparable to humans. By the early twentieth century, science had driven these beings from every planet in our system except the Earth, leaving our solar system as more or less desolate regions for (...) the most part bereft of intelligent life. This essay traces this extinction and its relation to religious thought, noting the role played in it by Sir John Herschel and especially by William Whewell. The inverse square laws for gravitation, heat radiation, and light receive special attention, as does the question of the relevance of the Christian notions of a divine incarnation and redemption. (shrink)

David Lewis's book 'On the Plurality of Worlds' mounts an extended defense of the thesis of modal realism, that the world we inhabit the entire cosmos of which we are a part is but one of a vast plurality of worlds, or cosmoi, all causally and spatiotemporally isolated from one another. The purpose of this article is to provide an accessible summary of the main positions and arguments in Lewis's book.

ABSTRACT In 1758 in London, Swedish natural philosopher and mystic theologian Emanuel Swedenborg published De Telluribus in Mundo nostro Solari, a treatise on the plurality of worlds and life on other planets. During the seventeenth and eighteenth centuries, these topics formed a heterogenous literary genre which encompassed theology, astronomy, philosophy and satire. In De Telluribus, Swedenborg made detailed claims of communication with extraterrestrial spirits in the afterlife, through which he sought to spread his theology to new audiences. The (...) paper will explore the role of De Telluribus in Swedenborg's career, explain its content and analyse its polarized reception. It will show that De Telluribus combined for the first time the literary codes of two popular genres during the period, namely those concerning the plurality of worlds and the dialogues of the dead. By doing so, the paper revises current scholarly understanding of Swedenborg by showcasing him as a versatile yet ill-fated recombiner of literary genres. More broadly, the paper will shed light upon previously unnoticed eighteenth-century literary interactions along with a wider overview on the reception of themes such as the plurality of worlds, mysticism and satire in Scandinavia and Germany. (shrink)

Summary The object of this study is to analyse certain aspects of the debate between David Brewster and William Whewell concerning the probability of extra-terrestrial life, in order to illustrate the nature, constitution and condition of natural theology in the decades immediately preceding the publication in 1859 of Charles Darwin's Origin of species. The argument is directed against a stylised picture of natural theology which has been drawn from a backward projection of the Darwinian antithesis between natural selection and certain (...) forms of the design argument. Contrary to the popular image of natural theology as an essentially static, autonomous and monolithic set of presuppositions about the existence of design in nature, the paper underlines the existence of a fundamental divergence of strategies within natural theology, a divergence that, in the case of Brewster and Whewell, can be correlated with the religious cultures to which they most closely belonged. The fact that, in the plurality of worlds debate, their respective positions became mutually exclusive suggests that the fragmented and disordered state of natural theology, only too apparent before the Darwinian impact, was occasioned as much by the ulterior problem of rationalising the excessive space of the astronomers and the excessive time of the geologists as it was by any principle of the uniformity of nature in the biological sphere. The argument is substantiated with particular reference to the breakdown in communication as Brewster and Whewell developed conflicting strategies to expose the ?development hypothesis? that had appeared in Vestiges. Their altercation also reveals a certain conflict of status concerning the conclusions of astronomy and geology which, in turn, suggests that tensions between the physical and life sciences were not peculiar to the period following the publication of Darwin's theory. (shrink)

This book is an explication and defense of the author's modal realism. There are possible worlds and individuals, he says, different from the possibles realized in this world of ours. The reality of the many possibilities is a hypothesis needed for explaining the representational character of our language, as when we say that there might be talking donkeys, though there are none. It is the reality of these possibles, as worlds and individuals, that Lewis defends.

Pierre Duhem and Eugenio Randi have investigated the later-medieval history of the problem of whether the existence of more than one world is possible, determining that Aristotle's denial of that possibility was rejected on theological grounds in the second half of the thirteenth century, but it was Nicole Oresme in the mid-fourteenth century who gave the strongest philosophical arguments against the Peripatetic stance, opting instead for Plato's position. For different reasons, neither Duhem nor Randi was able to examine Gerald Odonis' (...) question on the subject. In this text, edited here, Odonis also opposes Aristotle for philosophical reasons and sides explicitly with Plato. Was Oresme aware of Odonis' opinion? (shrink)

According to David Lewis, a realist about possible worlds must hold that actuality is relative: the worlds are ontologically all on a par; the actual and the merely possible differ, not absolutely, but in how they relate to us. Call this 'Lewisian realism'. The alternative, 'Leibnizian realism', holds that actuality is an absolute property that marks a distinction in ontological status. Lewis presents two arguments against Leibnizian realism. First, he argues that the Leibnizian realist cannot account for the (...) contingency of actuality. Second, he argues that the Leibnizian realist cannot explain why skepticism about one's own actuality is absurd. In this paper, I mount a defense of Leibnizian realism. (shrink)

That life probably exists on other bodies in the universe is now a commonplace. That intelligent life exists elsewhere in the universe--taking for granted its presence on earth--is a widespread hope. Scientific efforts are under way, including space probes, special observations, and broadcast programs, in the systematic search for extraterrestrial intelligence. The question naturally arises whether other human beings are somewhere out there. Fresh avenues of philosophic reflection are opening concerning ethics, theology, and the metaphysics of being human. Imagination has (...) been abundantly working over such issues extraterrestrially. Science fiction has run worlds away from science fact. Surrounded by yearning, fantasy, and popular culture, we need to clarify the intellectual grounds for work on extraterrestriality. The topic of other worlds and other intelligent life is an ancient and recurrent theme in great world cultures, including the Western tradition. (shrink)

By the middle of the nineteenth century, the opinion of science, as well as of philosophy and even religion, was, at least in Britain, firmly in the camp of the plurality of worlds, the view that intelligent life exists on other celestial bodies. William Whewell, considered an expert on science, philosophy and religion, would have been expected to support this position. Yet he surprised everyone in 1853 by publishing a work arguing strongly against the plurality view. This (...) was even stranger given that he had endorsed pluralism twenty years earlier in his contribution to the Bridgewater Treatises. In this paper I show that the shift in Whewell’s view was motivated by three factors: the influence of Richard Owen’s theory of archetypes on Whewell’s view of the argument from design, and Whewell’s perception of the need to strengthen such arguments in light of evolutionary accounts of human origins; important developments in his view of philosophy and his role as a scientific expert; and new findings in astronomy. An examination of the development of Whewell’s position provides a lens through which we can view the interplay of theology, philosophy and science in the plurality of worlds debate.Keywords: William Whewell; Plurality of worlds; Natural theology; Analogies; Archetypes; Conjectures; Evolution. (shrink)

A commentary on David Lewis's /On the Plurality of Worlds/.

These selections from Le système du monde, the classic ten-volume history of the physical sciences written by the great French physicist Pierre Duhem (1861-1916), focus on cosmology, Duhem's greatest interest. By reconsidering the work of such Arab and Christian scholars as Averroes, Avicenna, Gregory of Rimini, Albert of Saxony, Nicole Oresme, Duns Scotus, and William of Occam, Duhem demonstrated the sophistication of medieval science and cosmology.

By digging through the stratigraphy of the history of ideas we can find within and beyond Marxism an 'aleatory current' that values the role of chance in history. Using this perspective, the book builds a case for a historical materialism that is stripped of all teleology. Starting in the ancient Mediterranean with Epicurus, it traces the history of conceiving history as plural up to Marxism and modern science. It shows that concrete historical 'worlds' such as ancient Mesoamerica and Eurasia (...) cannot be reduced to a single template. Affirming the potentiality of a future non-capitalist 'world', it invalidates any 'end of history' thesis. (shrink)

Cognitive forms vary considerably as a human being detaches herself from what is closest and most personal and moves to communicate — in the broad sense of taking part in a common matter — across increasing relational distances. The article proposes to deal with the variety of cognitive formats which cannot `commonize' cognition to an equal degree, relating them to a set of regimes of engagement with the world that are identified in terms of the dependency between the human agent (...) and her environment. The good that engagement aims to guarantee orients how reality is grasped and specifies the format of what constitutes relevant information. This analysis offers new insight into the composition of communities as well as persons who have to cope with the plurality of cognitive formats and engagements from the very familiar to the most public. (shrink)

These selections from _Le système du monde_, the classic ten-volume history of the physical sciences written by the great French physicist Pierre Duhem, focus on cosmology, Duhem's greatest interest. By reconsidering the work of such Arab and Christian scholars as Averroes, Avicenna, Gregory of Rimini, Albert of Saxony, Nicole Oresme, Duns Scotus, and William of Occam, Duhem demonstrated the sophistication of medieval science and cosmology.

It is an issue of already longstanding significance in philosophy of religion after John Hick, that is of differing models of religious consciousness, in the frame of interreligious relations which is tackled in the paper but it is done on the basis of the texts of a concrete philosopher and the narratives around his figure. One of the most eminent Naiyayikas, Udayana, is singled out, as the author of the very renown composition in verse Nyāyakusumaňjali offering arguments for the existence (...) of God in the framework of polemics with the anti-theistic schools and the anti-Buddhist fundamental compendium Ātmatattvaviveka, along with the stories about his very resolute and victorious struggle against Buddhism in the epoch of the latter’s final extirpation from India. The author comes to conclusion that the features of exclusivism, inclusivism and gradualism are detected in his texts and traditions around him and, therefore, any univocal authentication of his attitude to otherwise-minded and those of other faiths is impossible. While participating in the supplantation of Buddhism from India, Udayana displays very resolute exclusivism. When he addresses the educated audience sermonizing his philosophical theism, he uses purely inclusivistic strategy of uncovering implicit knowledge of Īśvara even with those very far removed from the truth. And when he attempts to locate Nyāya on the map of philosophical world-views he uses gradualism as “philosophy of ascent” of the truth from lower to higher levels. As is impossible as well to mark out of his attitudes the so-called pluralism considered by Hick as fundamental advantage of Eastern religions over the Western ones. Comparativistic parallels along with differences and some specification of the main categories of interreligious relations are also offered in the paper. (shrink)