Why willpower alone doesn’t work

Three thousand years ago, Odysseus tied himself to a mast to resist the Sirens. He didn't trust his willpower, so he removed the choice entirely. Today, Owain Service, co-founder of the Behavioural Insights Team and CEO at CogCo, calls that a commitment device. And modern evidence shows it works for everything from saving money to staying married. --- Owain’s book: Owain’s company CogCo: Unlock the Nudge Vaults: ⁠ Join 11,626 readers of my newsletter: ⁠ ⁠ Connect on LinkedIn: ⁠ --- Today’s sources: Asch, S. E. (1951). Effects of group pressure upon the modification and distortion of judgment. In H. Guetzkow (Ed.), Groups, leadership and men (pp. 177–190). Carnegie Press. Ashraf, N., Karlan, D., & Yin, W. (2006). Tying Odysseus to the mast: Evidence from a commitment savings product in the Philippines. Quarterly Journal of Economics, 121(2), 635–672. Behavioural Insights Team. (2013). New BIT trial results: helping people back into work. Gollwitzer, P. M., & Brandstätter, V. (1997). Implementation intentions and effective goal pursuit. Journal of Personality and Social Psychology, 73(1), 186–199. Gollwitzer, P. M., & Sheeran, P. (2006). Implementation intentions and goal achievement: A meta-analysis of effects and processes. Advances in Experimental Social Psychology, 38, 69–119. Milkman, K. (2021). How to change: The science of getting from where you are to where you want to be. Portfolio/Penguin. Olson, R. (2014, October 10). What makes for a stable marriage. Read, D., Loewenstein, G., & Kalyanaraman, S. (1999). Mixing virtue and vice: Combining the immediacy effect and the diversification heuristic. Journal of Behavioral Decision Making, 12(4), 257–273. Service, O., & Gallagher, R. (2017). Think small: The surprisingly simple ways to reach big goals. Michael O'Mara Books.

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Why willpower alone doesn’t work is an episode from Nudge - Marketing Science Podcast by Phill Agnew.

This episode is 25:14 long.

This episode was published on May 4, 2026.

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