The polycrisis is one system, and it is already looping.

Complexity theorists Edgar Morin and Anne Brigitte Kern coined the term in the 1990s to name the "complex intersolidarity" of the planet's problems — not one big threat, but a network of threats that reinforce each other. Economic historian Adam Tooze popularized it at Davos in January 2023, and the Cascade Institute gave it working precision: a polycrisis exists when crises in multiple global systems become causally entangled, so that the whole does more harm than the parts would have done separately.

That last clause is the analytical core. A "perfect storm" is coincidence — bad luck that passes. A polycrisis is causation — one crisis raising the probability and lowering the cost of the next. The pandemic was not caused by climate change, and neither caused the war in Ukraine. But each one changed the conditions under which the other two did their damage, and the interactions produced outcomes none of them would have produced alone.

The standard polycrisis diagram shows six nodes: climate volatility, financial turbulence, geopolitical fragmentation, digital insecurity, supply-chain fragility, and demographic pressures. The arrows between them are the insight — cyber vulnerabilities trigger market panic, trade barriers raise costs, climate shocks displace people who then strain institutions. That reading is correct as far as it goes. It stops too early.

The nodes sit inside a larger system. Six of nine planetary boundaries are already transgressed, and the remaining three are each under pressure in their own way. A six-node map of a nine-boundary system leaves out the biosphere, the ocean, the land, and the cryosphere: the very domains where feedback loops close. Once a loop closes, the system no longer needs a new shock to keep accelerating. It compounds on its own.

The Cascade Institute's model gives the system a grammar. A crisis happens when one or more slow-moving stresses interact with one or more fast-moving trigger events to push a global system out of its established equilibrium and into a volatile, harmful state. Stresses are the slow accumulations — rising inequality, resource scarcity, over-leveraging, climate heating, ecological degradation — that progressively shallow the basin of attraction holding the system stable. Triggers are the fast, stochastic events — an invasion, a price spike, a bank failure, the loss of a keystone species — that finally push the system over the edge.

Neither element does the damage alone. The trigger multiplies the impact of the stress; a shallow basin means a smaller trigger can tip the system. The 2008 financial crisis is the canonical case: decades of opaque securitization and balance-sheet interdependence were the stress; the Lehman Brothers collapse was the trigger; the crisis ended only when central banks rebuilt a floor under the system. The basin has been shallowing again since — through debt, inequality, and heating — which is why smaller shocks now produce larger crises.

The simultaneity of today's crises is probably not coincidence. The Cascade Institute identifies eight global systems all undergoing radical change at once: the Earth's environmental system is leaving its Holocene equilibrium; the energy system is shifting away from fossil fuels with an uncertain destination; the international security system is moving from Pax Americana toward multipolarity; the economic system is abandoning neoliberal orthodoxy for an indeterminate successor; the information system is being revolutionized by artificial intelligence; and the food, transportation, and health systems are all absorbing the shocks of the others.

Adaptive-cycle theory explains why this alignment matters. Systems that grow increasingly connected, specialized, and efficient become rigid — and rigidity is the prelude to breakdown and reorganization. Several global systems now sit at the same phase of that cycle at the same time. When multiple systems align at the cusp, a breakdown in one can trigger breakdowns in the others. The alignment, not any single system's fragility, is the risk.

When a shock propagates, it travels through one or more of four channels. Physical/resource contagion halts the flow of essential goods — a blocked canal, a weaponized pipeline, a failed breadbasket. Financial contagion reprices risk at the speed of light — a sovereign default in one market starves unrelated economies of capital. Informational/digital contagion spreads the narrative faster than the event — misinformation can trigger bank runs or violence before the underlying facts are known. Institutional contagion is the slowest and most corrosive — when a governance structure fails on one crisis, it loses the legitimacy needed to manage all the others.

Most headline crises now move through all four vectors at once. The 2022–2025 shockwave did: a physical war, a financial repricing, an informational battlefield, and the visible exhaustion of the multilateral institutions that were supposed to contain it. A response that treats only one vector leaves the other three carrying the shock.

The existing polycrisis conversation runs on hazard numbers and system diagrams. This report adds the earth-system domains the diagram leaves out — biodiversity loss, ocean acidification and deoxygenation, land aridity, freshwater stress, cryosphere tipping points, and pollution — and the secondary impacts those domains generate.

It then follows the secondaries: wildfires as the exhaust of a closed heat–drought–fire loop, feedback loops as the mechanism that converts linear warming into accelerating damage, and insurance and fiscal cascades as the point where physical risk becomes financial risk. Each page closes on what the evidence changes for anyone watching the system.