More than a year into the UN80 reform process, much of the work has already been done. Mandates have been reviewed, overlaps identified, reporting lines clarified, and administrative efficiencies pursued.

In a complex, member state–driven institution, this is no small accomplishment. Reform at scale in the United Nations is rare, and reform that survives intergovernmental scrutiny is rarer still. Yet as UN80 moves from design to consolidation, a deeper question emerges: what exactly has been reformed, and what should the process achieve?

While UN80 may improve the UN’s coherence and institutional agility, the world confronting the organization is not merely complicated; it is structurally volatile and highly unpredictable. Climate shocks, technological acceleration, geopolitical fragmentation, and financial instability interact, cascade, and reshape one another in ways that make stable institutional decision making increasingly difficult.

This volatility creates a paradox for reform efforts: institutions can become faster and more coherent on paper yet remain unable to adapt once conditions change. Adaptability requires more than just coherence and speed; it requires the capacity to learn continuously, revisit assumptions, and adjust direction.

For large bureaucracies like the UN, adaptation is both politically and structurally difficult. The UN tends to operate through a largely sequential “waterfall” logic whereby problems are defined, analyzed, solved, and evaluated in stages, with the biggest decisions made up front when the least is known. In this paradigm, uncertainty is treated as something that must be reduced before action can begin. Planning precedes execution, while evaluation often takes place after the window for course correction has closed.

While this model works well in many contexts, it struggles in complex systems where conditions are continuously evolving. The result is an institutional logic that rewards organizations and public officials for committing early and defending their initial assumptions. It privileges politically safe decisions based on initial understandings over those with less certain but potentially more consequential results.

For the United Nations, this sequential waterfall logic describes how decisions are made across peace operations, development programming, and humanitarian response—all environments where conditions shift faster than mandates can be renegotiated and where the cost of misreading a situation compounds over time. The challenge UN80 (and the reforms preceding it) has not yet fully addressed is a deeper question: whether the organization can treat uncertainty as a condition to be worked with rather than a problem to be resolved before action begins.

Waterfall Logic in the Multilateral System

When waterfall logic meets the complexity of global policy challenges, a series of compounding patterns typically emerge.

Institutional processes are not set up to deal with uncertainty: Under pressure to secure funding and demonstrate value and impact, departments are often required to produce defensible business cases with a defined scope, measurable outcomes, delivery timelines, and cost certainty. Yet in conditions of uncertainty, these attributes are often unknowable up front. As a result, assumptions made early in the process harden into delivery plans, reporting structures, and funding commitments that become increasingly difficult to revisit, even as conditions change.

Time horizons compress around funding cycles and reporting requirements: Deliverables that fit within annual or multiyear budget frameworks take precedence over long-term prevention and resilience, particularly in areas where success means that nothing dramatic happens. Those working in conflict prevention will recognize this tension acutely. But similar dynamics shape public health, humanitarian response, and development, where institutions remain under pressure to demonstrate attributable impact within fixed budget cycles.

Learning becomes episodic rather than continuous: One of the clearest symptoms of making immovable decisions up front is that evaluation follows implementation rather than shaping it. Assumptions embedded in program design, budget allocations, and political agreements are often revisited only following visible failures. By that point, financial, political, and institutional capital has already been committed, narrowing the space for meaningful iteration.

Figure 1: Waterfall-Style Programs Start with Many Risky Assumptions

Adapted from: Andrew Greenway and Tom Loosemore, “The Radical How,” Public Digital, 2024.

These dynamics are not unique to the UN. They are inherited from the “new public management” era of public administration that emerged in the 1980s, which prioritizes control, predictability, budgetary discipline, and auditability. This approach ties funding, incentives, and legitimacy to predefined outputs, making experimentation and adaptive learning increasingly difficult over time. The core words of UN80—impact, effectiveness, efficiency—are hallmarks of new public management.

The United Nations institutionalizes this logic directly. Mandates remain pillar-bound across peace and security, development, and human rights, despite language around “nexus” approaches. Budget lines are attached to those mandates, while reporting structures emphasize ex ante planning and ex post compliance. These features intentionally protect program delivery and institutional coherence in a contested political environment. But they also embed a sequential planning logic that is difficult to escape.

With its focus on eliminating duplication and improving coherence, UN80 has largely operated within this inherited decision-making architecture. Mandates may have been rationalized, but they have not been reorganized around cross-cutting systemic risk. Budget processes remain oriented toward predictable outputs rather than adaptive experimentation. Monitoring systems continue to emphasize retrospective reporting over real-time testing of assumptions. The result is an institution that may be more stable and focused but remains difficult to adapt.

Embedding Uncertainty at the Heart of the UN

Routine administration requires predictability, clear accountability, and risk minimization. In contrast, transformational efforts—preventing ecological collapse, governing emerging technologies, or managing cascading conflict—require cross-functional integration, iterative experimentation, rapid feedback loops, and tolerance for uncertainty.

This distinction matters acutely for the United Nations, which must simultaneously deliver ongoing humanitarian programs reliably, uphold normative frameworks in areas such as human rights and disarmament, prevent violent conflict in fragile environments, and anticipate systemic risks that evolve across domains and decades. Some of these responsibilities require stable administration. Others require governance modes that cut across pillars, operate over longer time horizons, and treat uncertainty as a condition to be navigated rather than eliminated.

The solution is not a wholesale redesign of the UN system or even discarding the progress made by UN80; it is to create differentiated governance modes that can be activated to address systemic risks and deactivated when conditions stabilize. Leaning on emerging literature and practice around “mission governance”—the organization of people, funding, technology, and cross-institutional capacity around defined long-term outcomes that cut across existing mandates and structures—we believe four shifts could help make this possible.

1. Creating Cross-Pillar Teams

For the UN, mission-driven approaches could mean developing small, time-bound, cross-pillar governance arrangements organized around shared outcomes rather than existing mandates alone. These would not be permanent new departments or standing bureaucracies but temporary teams with clear authority, involvement of senior leaders, and the ability to draw together staff, expertise, and resources from across existing structures.

Their purpose would be to test and learn through implementation—launching live pilots, learning from them, and iterating as conditions evolve. This is not an entirely new idea. Elements of this logic can already be seen in the secretary-general’s proposal for “Emergency Platforms” to serve as temporary, system-wide coordination mechanisms for responding to complex global shocks. Though this proposal is politically contested, some version of these platforms could be a way to manage uncertainty.

The underlying principle is straightforward: When challenges cut across existing structures, governance capacity often needs to be created between them.

2. Funding Learning, Not Fixed Commitments

UN80 was created as a response to a liquidity crisis, and as a result the reforms are largely geared toward reducing spending, finding efficiencies, and creating a clearer link between activities and impact. This logic works for stable problems where the conditions do not radically change during the course of the activities, and it may well improve some of the UN’s activities.

However, mission-scale challenges cannot be governed effectively based on fixed assumptions and traditional monitoring and evaluation. They require regularly asking: Are the causal pathways still valid? Have feedback loops shifted? Has the context changed in ways that warrant reallocation?

This means that learning needs to be formally tied to resourcing and commitment. If budgets and delivery models cannot adjust in response to evidence (because political commitments, donor expectations, or institutional incentives make reallocation too costly) learning becomes informational rather than operational.

Put simply, funding should follow evidence, not the other way around. To pursue a mission focused on climate-related displacement, for example, an organization might initially invest across several approaches: community adaptation, anticipatory humanitarian finance, regional mobility agreements, and early-warning systems. At regular review points—perhaps every quarter—resources could then shift toward the approaches proving most effective as conditions evolve and risks intensify. If displacement pressures escalate faster in one region than another, or if early-warning systems begin outperforming reactive humanitarian response, funding and coordination could adapt accordingly. The objective of such an iterative approach is to preserve capabilities that prove valuable as conditions change while allowing tactics and allocations to evolve.

3. Rewarding Prevention, Learning, and Stewardship

Prevention is structurally undervalued because its successes are often invisible. When anticipatory action averts crisis, there is no headline, ribbon-cutting moment, or clear line of attribution. The absence of failure is politically quieter than the management of visible emergencies. Over time, this teaches institutions and the people within them that stewardship, foresight, and patient cross-boundary work matter less than reactive activity. This presents an enormous risk to UN80’s focus on impact, results, and efficiencies against specific mandates: How will we know if the system is becoming better at prevention?

A mission-oriented model would shift the accountability framework. Instead of focusing solely on compliance with mandates and avoidance of error, performance frameworks would also recognize contributions to long-term risk reduction, cross-pillar collaboration, and institutional learning. Reviews of senior leaders could assess whether teams identified emerging risks early, whether partnerships improved collective response capacity, and whether interventions altered the trajectory of a known risk.

Under this model, risk assessments would also be treated as continuous processes rather than one-time compliance exercises. As recent work on anticipatory governance and long-term policy capacity has demonstrated, institutions operating under sustained uncertainty need mechanisms for repeatedly reassessing risk trajectories as conditions evolve. Such a shift would turn one of the most repeated priorities—prevention—from a mantra into something that can be valued, measured, and improved.

4. Adopting a Portfolio Logic

These three shifts are mutually reinforcing, but they require an organizing principle to function together. That principle is portfolio management: treating mission-scale initiatives as part of a wider strategic portfolio rather than isolated programs.

Some interventions will underperform. Others will prove catalytic. The objective is not uniform delivery across every activity but directional progress across the system as a whole. Portfolio logic distributes risk rather than concentrating it.

Cities offer some of the most mature examples of this logic in practice. Leuven 2030 in Belgium brings together public authorities, businesses, universities, and civic actors around a shared climate mission through a portfolio of mutually reinforcing interventions across mobility, housing, energy, and behavior change, continuously adjusted as conditions evolve. Used well, portfolio logic strengthens stewardship by allowing institutions to manage uncertainty deliberately rather than pretending it can be eliminated in advance. It is the organizing principle through which cross-pillar teams, adaptive funding, and the rewarding of prevention can function as a coherent whole rather than isolated reforms.

The Architecture of What Comes Next

It is important to recognize the positive change that can result from UN80—many of the reforms, particularly around how mandates are created in the future, can have helpful impacts. But it is of existential importance to the organization that it becomes adept at managing the kind of complex, uncertain, interconnected challenges facing the world today.

Our four proposed shifts offer a way to extend and expand UN80’s logic rather than contradicting it. Creating cross-pillar teams for complex problems, building more iterative learning into programming, specifically valuing prevention, and adopting portfolio approaches are all steps that could be taken without major architectural reforms. But if they are not embedded within the current process, there is a risk that the UN system becomes even more attached to its waterfall logic. UN80 could show that the system can stabilize around a less expensive version of itself, locking in a rigid “impact-focused” model unable to adapt to fast-moving, uncertain dynamics. The test of the UN’s relevance as we move into the second quarter of the 21st Century is whether it can thrive in conditions of sustained uncertainty.