Agren, JonDavies, Nicholas G.Foster, Kevin2023-11-062020-02-10Agren, Jon, Nicholas G. Davies, Kevin Foster. "Reply to: Broad definitions of enforcement are unhelpful for understanding evolutionary mechanisms of cooperation." Nat Ecol Evol 4, no. 3 (2020): 323-323. DOI: 10.1038/s41559-020-1112-y2397-334Xhttps://nrs.harvard.edu/URN-3:HUL.INSTREPOS:37377341This is a Reply to Matters Arising from our paper Ågren JA, Davies NG, and KR Foster. 2019. Enforcement is central to the evolution of cooperation. Nature Ecology and Evolution.3: 1018–1029, which was previously granted an Open Access Policy Waiver on March 29.While Engelhardt and Taborsky1 agree with the core argument of our recent article2—that enforcement is central to the evolution of cooperation—they go on to suggest i) that our use of the word “enforcement” is semantically problematic and ii) that we neglect to distinguish between behavioural manipulations that occur via helping or harming. We find no merit in these points.en-USEcologyEcology, Evolution, Behavior and SystematicsJournal Article2023-11-0610.1038/s41559-020-1112-y