Building Resilient Development Pathways Through the Global Polycrisis

The defining danger of the current period is not the size of any single hazard but the coupling between hazards, and that coupling falls hardest on the economies least able to absorb it. Since 2020 a pandemic, a food and energy price spike, the sharpest rise in global borrowing costs in a generation, an accelerating run of climate extremes, and a fragmenting geopolitics have arrived on top of one another and transmitted their stress into one another. This report treats that condition, commonly labelled "polycrisis", as a development problem: shocks that originate in one system now propagate through a small set of shared channels — prices, exchange rates, fiscal space, credit, and confidence — that are concentrated in the structure of developing economies, so that the same physical hazard does far more systemic damage there than in a diversified, local-currency economy.

The report's central argument is that the systemic vulnerability which turns coupled shocks into cascading crises is built rather than given — accumulated through the composition of a country's energy system, the placement and standard of its infrastructure, the depth of its safety nets, and the state of its public finances — and can therefore be reduced by deliberate choices about how development proceeds. Using the disaster-risk framework of hazard, exposure, sensitivity, and adaptive capacity, it identifies two levers that do most of that work: adaptation, which raises adaptive capacity and lowers sensitivity to the shocks that arrive regardless; and clean infrastructure, which cuts exposure, severs the imported-fuel transmission channel, hardens systems through distribution, and shrinks the hazard itself. The two are complements whose combined return exceeds the sum of their parts, concentrated in a set of double-duty investments that pay in conventional development terms and in resilience at once.

The binding constraints are financial and institutional, not technical. The highest-return interventions are known and their benefit–cost ratios are exceptional: the Global Commission on Adaptation put returns across a portfolio of measures at two-to-one up to ten-to-one, the World Bank's Lifelines analysis found roughly four dollars of benefit per dollar of resilient-infrastructure premium, and multi-hazard early warning returns on the order of ten to one. Yet UNCTAD reports developing-country external debt at a record US$11.4 trillion and net interest at US$921 billion in 2024, with 3.4 billion people in countries that spend more on debt service than on health or education; the UNEP Adaptation Gap Report 2025 puts adaptation needs at US$310–365 billion a year by 2035 against international public flows of about US$26 billion; and clean-energy investment, now roughly twice that in fossil fuels globally, barely reaches developing economies outside China because of a 400–800 basis-point cost-of-capital wedge that a capital-intensive, front-loaded pathway is acutely sensitive to.

Because infrastructure is long-lived and vulnerability accumulates, the timing of the choice is decisive: the pathway a developing economy sets in this decade is locked in for the life of the assets it builds, and the premium on the resilient option is smallest before the concrete is poured. The report sets out the framework, shows why the polycrisis is a development problem, examines lock-in and each of the two levers, makes the case for their synergy, addresses the financing and institutional constraints, proposes a three-tier sequencing rule, and grounds the argument in the experience of Bangladesh, Kenya, Morocco, Vietnam, Barbados, and Rwanda. Its central finding is that the countries which absorb shocks well are distinguished less by their wealth or exposure than by whether they built and protected the enabling capacity — fiscal space, delivery institutions, pre-arranged finance, durable coordination — before the shocks arrived; and that the task for the coming decade is not to invent a resilience agenda but to fund it, integrate it, sequence it, and build it in advance.