Our genes still expect us to eat a higher fat diet; they still see agricultural foods (and modern foods such as sugar), as poisonous; they still see lack of sunlight and exercise as problematic. We haven't genetically adapted to modern life because there is no selection pressure in the civilised world.
Mark Sisson, Primal Blueprint 21-Day Total Body Transformation: A Step-by-Step, Gene Reprogramming Action Plan
diet, food, genes, nutrition, paleo-diet