capacity for war is closely linked to our exceptionally cooperative abilities [5, 6]. The parochial altruism model formally … corroborating the model, we find that our new measures which cleanly separate interindividual altruism from intergroup parochialism …

-cycle model as well as saving motives that are consistent with the altruism model are important in Europe implies that the two … suggests that this model is far more applicable in Europe than is the altruism model. Moreover, our finding that the … intergenerational transfers motive, which is the saving motive that most exemplifies the altruism model, accounts for only about one …