, Volume 184, Issue 3, pp 375–386

An unwelcome consequence of the Multiverse Thesis


DOI: 10.1007/s11229-010-9820-5

Cite this article as:
Effingham, N. Synthese (2012) 184: 375. doi:10.1007/s11229-010-9820-5


The Multiverse Thesis is a proposed solution to the Grandfather Paradox. It is popular and well promulgated, found in fiction, philosophy and (most importantly) physics. I first offer a short explanation on behalf of its advocates as to why it qualifies as a theory of time travel (as opposed to mere ‘universe hopping’). Then I argue that the thesis nevertheless has an unwelcome consequence: that extended objects cannot travel in time. Whilst this does not demonstrate that the Multiverse Thesis is false, the consequence should give pause for concern. Even if it does not lead one to reject the thesis, I briefly detail some reasons to think it is interesting nonetheless.


Time travel Deutsch Lockwood Gunky spacetime Receptacles Many worlds Multiverse 

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Department of PhilosophyUniversity of BirminghamBirminghamUK

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