1) The document discusses the moral theory of deontology, which evaluates actions based on duty and obligation. 2) Deontology was mainly developed by Immanuel Kant, who argued that as rational beings, humans have the capacity to act according to principles they determine themselves through their rational will. 3) According to deontology, duty is a uniquely human experience because animals do not possess rational will, while humans can conceive of duties through their rational faculties beyond their immediate surroundings.