Many of the risks that matter most today do not respect the boundaries of ministries, mandates or states. A drought becomes a food, energy, health and migration problem. A new technology raises questions for competition, security, labour and rights at once. A pandemic tests health systems, public finances, supply chains and public trust together. Policy, by contrast, is usually made in separate portfolios, on separate timetables, with separate evidence and accountability.
Policy science has a well-established account of why this is hard. Benefits of prevention are uncertain and delayed while costs are immediate; responsibilities are fragmented so that no single body owns a cross-cutting risk; information is unevenly distributed; and the actors who must cooperate often have different incentives. Coordination failures are therefore common even when everyone agrees a risk is serious. Implementation adds further gaps, as policies designed centrally meet local capacity limits and unforeseen behaviour.
When policy fails on a shared risk, the consequences cascade across sectors and borders. Unmanaged exposure in one place becomes a cost in another; a regulatory gap in one jurisdiction becomes a channel for risk into others. The field exists to help institutions see these connections, compare how others have responded and learn what works in practice.
Why now: much of 2026's policy agenda is implementation, from national plans under the Paris Agreement and the Kunming-Montreal Global Biodiversity Framework to the amended International Health Regulations in force since September 2025. Policy Nexus compares how jurisdictions assign and carry these duties, convenes the institutions concerned, and records options and dissent; reviewed comparisons can inform country and regional editions of Reports.