Alliance modernization will include expanding the scope beyond traditional military cooperation to address emerging challenges in cyber, space, and economic security. This panel will examine how these new domains are reshaping the strategic landscape and what steps allies must take to adapt. Cyber threats and disinformation campaigns undermine resilience; competition in space raises complex questions of deterrence and governance; and economic coercion tests the security of supply chains and critical technologies. This session will consider how alliances can be modernized to integrate these dimensions to ensure comprehensive security in an era of uncertainty.