According to the received opinion there is a theoretical incompatibility between Herbert Hart'sThe Concept of Lawand Alf Ross'sOn Law and Justice, and, according to the received opinion, it stems above all from Hart's emphasis on the internal point of view. The present paper argues that this reading is mistaken.The Concept of Lawdoes not go beyondOn Law and Justicein so far as both present arguments to the effect that law is based on a shared understanding between participants in a project perceived (...) by every participant to be a project in common. The paper demonstrates that there are substantive parallels between Hart's combination of “acceptance” or “acknowledgement” and a “critical reflective attitude” and Ross's combination of “motivation” or “feeling” and a “coherent whole of meaning and motivation.” The main conclusion is that the views of norms and normativity put forward inThe Concept of LawandOn Law and Justiceare very close in essential respects, and, more specifically, that the two works are at root identical in their representation of the basis of normativity in reality. (shrink)