From a gene-culture evolutionary perspective, recently a rise in obesity percentages around developed countries is unprecedented; clearly the fatestest population-scale change in people´s phenotype ever to occur. Focusing on the contemporanious increase of obesity and diabetes in America (USA), thus, the predictions of human behavioral ecology (HBE) versus the predictions of social learning (SL) of obesity through cultural traditions and/or peer–to–peer influence.
(Article source) R. Alexander Bentley, Paul Ormerod & Damian J. Ruck Palgrave Communications volume 4, Article number: 146 (2018)