For twenty years, violent conflicts and related deaths have been spiralling, while forced displacement has nearly doubled in ten years. Why is this happening? And could a ‘peace lens’ help the UK respond more effectively in its forthcoming National Security Strategy? In this short piece, Larry Attree, Hillary Briffa, Thomas Martin and Richard Reeve discuss the challenges and ways forward, drawing on a roundtable convened on 01 May 2025 to explore this question.