If the global internet went down for a full year, the world would pass three tipping points: services fail within hours, supply chains collapse within weeks, and food shortages hit cities around month 3. The UN estimates that 70% of global economic activity now depends on internet-connected systems, and the economic cost of a 12-month outage would exceed $50 trillion — roughly half a year of global GDP.
Hour 1
Most people don't notice at first. Phones work (cellular voice is a separate-ish system, though data is dead). Lights stay on. ATMs fail immediately — card authorization goes through the net.
Within 30 minutes: panic at gas stations. Card readers are down. Cash-only. Lines start.
Day 1
Most office work stops. Email, Slack, calendars, video calls — gone. Knowledge workers go home.
Airports still fly, but barely. Booking systems, TSA databases, and air traffic coordination all have internet components. Expect massive delays, not total shutdown.
Hospitals shift to paper. Electronic health records are inaccessible. Most hospitals have 48-hour paper protocols.
Week 1
Retail shelves get thin. "Just-in-time" inventory systems rely on internet-connected logistics. Trucks still run — they just can't coordinate deliveries. Grocery store inventory drops to 30% of normal within 5 days.
Banks operate on cash reserves. Check processing slows from minutes to days (it used to work this way pre-1990).
Electric grid holds — mostly. SCADA industrial control systems have some internet dependencies, but most can failover to internal networks.
Month 1
Supply chains are hemorrhaging. Semiconductor fabs stop because they can't coordinate with 3,000-supplier JIT networks. Automotive production halts. Pharma manufacturing slows.
Unemployment starts rising. Remote workers can't work. Service businesses without POS systems close. Estimated 20% of jobs require internet for any daily function.
Month 3
City food logistics break. NYC imports roughly 95% of its food. Without internet coordination, deliveries become improvised. Rationing starts in some metros.
Governments have stood up emergency coordination via radio and satellite voice. Some regions build local mesh networks.
Social fabric strains. Crime rises in affected areas. In the 2021 Northeast US internet outages (hours, not months), 911 call volume spiked 300%.
Month 6 — the tipping point
Two futures diverge:
- Adaptation — local networks, amateur radio, physical supply chains rebuild. Life looks like 1985 with modern buildings.
- Collapse — if governance breaks first, food systems crash, and the hit is multi-year.
Which happens depends on region. Rural areas adapt faster (they're less internet-dependent). Dense cities collapse faster.
Month 12
If adaptation wins: most economies are running at 40-60% of pre-outage capacity. Paper records, radio networks, in-person banking. Painful but functional.
If collapse wins: refugee flows from cities, regional power grid failures, agricultural mismatches. Recovery measured in years.
Could this actually happen?
A global, 12-month outage from a single cause is extremely unlikely. The internet is deliberately decentralized — attacks on undersea cables, DNS, or core routers would degrade but not kill it.
More plausible scenarios: major regional outages (some countries lose internet for weeks). Authoritarian shutdowns during unrest. A bad Carrington-level solar event could knock out satellites and power-dependent routing for months.
What you'd want in your house
Cash. Paper records of passwords and contacts. A landline phone if possible. Ham radio license. Physical books. A backup food pantry. Everything your grandparents had, basically.
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Other civilizational what-ifs: nuclear bomb scenario, Yellowstone erupting, and asteroid impact.