On the Plurality of Worlds
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.
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Review: On the Plurality of WorldsUser Review - Mk Yost - Goodreads
Mind-blowing and not an easy read, but definitely worth it if you want to consider the possibilities/practicalities of other worlds. Read full review
Review: On the Plurality of WorldsUser Review - Steven - Goodreads
David Lewis was crazy. Crazy like a fox, maybe, but crazy. Completely brilliant, though. He gets 9.5/10 Berkeleys on the "This argument has an insane conclusion but I can't find the flaw in the reasoning" scale. Read full review