10.60507/FK2/YIWR09 Falk, Armin Armin Falk https://orcid.org/0000-0002-7284-3002 University of Bonn Boneva, Teodora Teodora Boneva https://orcid.org/0000-0002-4227-3686 University of Bonn Andre, Peter Peter Andre https://orcid.org/0000-0002-8213-527X Goethe University Frankfurt Chopra, Felix Felix Chopra https://orcid.org/0000-0002-7621-1045 Frankfurt School of Finance & Management bonndata 2026 Social Sciences Falk, Armin Armin Falk University of Bonn Falk, Armin Armin Falk 2026-05-15 2026-06-01 10.1126/SCIENCE.AEC9483 10.60507/FK2/YIWR09/JQUWRH 10.60507/FK2/YIWR09/G8HSVP 249518 15963662 application/pdf application/zip 1.0 Creative Commons Attribution 4.0 International License. This dataset contains the data and replication code for the paper "Homo cooperans: Understanding the nature of human cooperation", published in Science. Summary: Using globally representative data from an incentivized two-player cooperation experiment conducted in 125 countries (N = 101,123), we assess the extent of human cooperation and study its individual determinants. Across the globe, about two-thirds of people choose to cooperate. The decision to cooperate is significantly shaped by cooperation beliefs, injunctive norms, and preferences. Effect sizes of these determinants vary across countries, a variation that is systematically associated with historical and cultural markers. Globally, people underestimate others’ willingness to cooperate — humans are more cooperative than they believe. A simple information treatment reduces misperceptions and causally increases cooperation. Stata, Stata 19.5 R, R 4.5.2 and RStudio 2025.09.2 Python, Python 3.13.11