When people discuss the internet, they tend to discuss its surface: the platforms, the applications, the content. This is understandable. The surface is where people live. But the surface rests on a physical and institutional substrate that is, in important respects, more fragile than most people realize — and considerably less governed.

The Physical Layer

The internet is not a cloud. It is, at its foundation, a network of physical cables — including approximately 400 submarine cable systems carrying roughly 95 percent of international data traffic — supplemented by terrestrial fiber, microwave links, and satellite systems that are growing in importance but remain secondary for high-volume traffic.

These cables are owned by a mix of incumbent telecommunications carriers, technology companies that have built their own private networks, and specialized infrastructure firms. The ownership map has shifted significantly in the last decade as major platforms vertically integrated into the physical layer.

Submarine cables are vulnerable in ways that receive occasional attention after incidents and then recede from public discussion. They are cut by ship anchors and fishing equipment with some regularity — the industry handles dozens of faults per year. They are also potential targets for state actors, a fact that military and intelligence communities discuss seriously even as it remains largely absent from mainstream coverage.

The Concentration Problem

The internet was designed with redundancy as a core principle. The actual infrastructure has evolved toward concentration that partially contradicts that design.

A small number of internet exchange points handle a disproportionate share of global traffic. A small number of autonomous systems — the network operators that form the internet’s actual building blocks — carry the majority of long-haul traffic. A small number of content delivery networks serve the majority of web content.

This concentration has driven efficiency gains that have meaningfully improved performance and reduced costs. It has also created single points of failure that the original network architecture was designed to avoid.

The Governance Gap

Perhaps most importantly: the infrastructure that undergirds global communications is governed by a patchwork of private contracts, voluntary technical standards bodies, national regulatory frameworks that were largely designed for different technologies, and informal norms that work until they don’t.

This is not a crisis. It is a condition — one that has proven remarkably stable for longer than its critics expected. But stability under current conditions is not the same as resilience under stress conditions that have not yet been encountered.

Understanding this infrastructure is a precondition for making intelligent decisions about it, at every level from individual users to policymakers. We intend to cover it with the seriousness it deserves.