With US President Joe Biden’s new administration in office and the emerging multipolar order, it is time to update NATO’s Strategic Concept. With an American president that champions multilateralism back in the White House and growing nationalism and populism among NATO members, a new consensus is needed that reinvigorates the Alliance. As such, this article will argue that NATO’s Strategic Concept should focus on a return to a multilateral system in the transatlantic region. In particular, NATO members should focus their diplomatic tools and instruments of power on the region’s sovereignty and democracy, ensuring its members’ stability, endurance, and legitimacy. This article will also articulate the strategy NATO command, its leaders, and all members will have to utilize in order to produce the best possible avenue for the Alliance to operate within the new global order. I contend that through ​institutions of regionalism​, a concept I will explore in detail throughout this paper, NATO’s new Strategic Concept can be legitimized and offer more sweeping opportunities for bridging all members into a multilateral approach that protects their democratic processes and state sovereignty, along with elevating all NATO members’—Small, Middle, and Great Powers—positions and statuses in the multipolar order.