Worlds, Books, and Essential Properties

Alvin Plantinga

in The Nature of Necessity

Published in print February 1978 | ISBN: 9780198244141
Published online November 2003 | e-ISBN: 9780191598241 | DOI:

Series: Clarendon Library of Logic and Philosophy

 Worlds, Books, and Essential Properties

Show Summary Details


I begin by introducing the ideas of possible worlds, books on worlds, and essential properties. A possible world is a broadly logically possible state of affairs that is maximal. Furthermore, for any possible world W and proposition p, let the book on W be the set S of propositions such that p is a member of S if W entails p. Finally, an object x has property P essentially if and only if x has P and has it in every world in which x exists. I use the above three concepts to give a sound argument for the conclusion that human persons are essentially immaterial.

Keywords: essential; immaterial; possible worlds; property; proposition; state of affairs

Chapter.  9912 words. 

Subjects: Metaphysics

Full text: subscription required

How to subscribe Recommend to my Librarian

Buy this work at Oxford University Press »

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.