Liberal Western democracies have been too complacent when it comes to dealing with contemporary hybrid adversaries. We have been following rather than leading. It’s time to seize back the strategic initiative, but how do we do that? In this new report, Tim Sweijs and Samo Zilincik argue that Western democracies can and should develop a strategic deterrent posture in an age of hybrid conflict. Based on an extensive review of cross domain deterrence theory and practice, they offer four recommendations to policymakers.