J. M. E. Mc Taggart - "The Unreality of Time" (1908)

"The Unreality of Time" (1908)

In The Unreality of Time (1908), the work for which he is best known today, McTaggart argued that our perception of time is an illusion, and that time itself is merely ideal. He introduced the notions of the "A series" and "B series" interpretations of time, representing two different ways that events in time can be arranged. The A series corresponds to our everyday notions of past, present, and future. The A series is "the series of positions running from the far past through the near past to the present, and then from the present to the near future and the far future" (p. 458). This is contrasted with the B series, in which positions are ordered from earlier to later, i.e. the series running from earlier to later moments.

McTaggart argued that the A series was a necessary component of any full theory of time, but that it was also self-contradictory and that our perception of time was, therefore, ultimately an incoherent illusion.