Research has confirmed the existence of a robust relationship between certain conditions of work (high demand/low control, high effort/low reward) and a variety of adverse health outcomes including cardiovascular disease, mental disorders, and immune system dysfunctions. Recently, these same conditions have been implicated in the defeat of certain capacities, such as adaptability, coping, ability, memory, and creativity. Such conditions appear also to influence the likelihood of making successful recovery from illness or injury and of returning to productive employment. The dynamic (...) processes linking these conditions and outcomes nonetheless remains somewhat unclear. In this article, the role of fairness as a mediator of these connections is explored. In particular, the psychoneuro- immunological significance of promises explicit or implicit in the employment relationship is identified as being crucial to our understanding of how stress affects health and capacities. Practical implications are explored. (shrink)