Many acts of sacrifice cannot be accounted for as instances of sophisticated selfishness, altruism, Kantian duty, or collusion of the powerful. Economists find these acts puzzling and seek to accomodate them within standard instrumental models of increasing complexity. The paper argues in favor...

This paper argues in favour of introducing solidarity into economics as a new analytical category of human motivation which encompasses all forms of other-regarding behaviour (e.g. utilitarian altruism, evolved natural sympathy, Kantian imperatives) but which, additionally, can be refined so as...