Organon F
Volume 33, May 2026, Issue 2, Pages 162–181
ISSN 2585-7150 (online)
Research Article
The Paradoxes of Time Travel: 50 Years Later
Ryan Wasserman
David Lewis set the agenda for philosophical theorizing about time travel fifty years ago with his landmark paper "The Paradoxes of Time Travel". In honor of that anniversary, I review some of the central themes of his paper and discuss a few of the ongoing debates inspired by that work. In particular, I address some worries that have been raised for Lewis's characterization of time travel, his treatment of backward causation, and his proposed solution to the grandfather paradox.
Time travel; David Lewis, backward causation; Grandfather Paradox.
Author
Ryan Wasserman
Affiliation
Western Washington University
Address
Department of Philosophy, Western Washington University, Bellingham, WA 98225, USA
Received
6 October 2025
Accepted
17 December 2025
Publishers
Institute of Philosophy of the Slovak Academy of Sciences
Institute of Philosophy of the Czech Academy of Sciences
APA
Wasserman, R. (2026). The Paradoxes of Time Travel: 50 Years Later. Organon F, 33(2), 162–181. https://doi.org/10.31577/orgf.2026.33203
Chicago
Wasserman, Ryan. 2026. "The Paradoxes of Time Travel: 50 Years Later." Organon F 33 (2): 162–181. https://doi.org/10.31577/orgf.2026.33203
Harvard
Wasserman, R. (2026). The Paradoxes of Time Travel: 50 Years Later. Organon F, 33(2), pp. 162–181. https://doi.org/10.31577/orgf.2026.33203
© Ryan Wasserman
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