The Wired World

Technologies usually spread the way wealth does: to the rich first, to the poor eventually, to the poorest sometimes never. The landline telephone took a century to reach most of the world and never finished the job — vast stretches of Africa and South Asia simply skipped it. That is what makes the charts below so unusual. The internet and the mobile phone reached billions of people in the Global South not a century after the rich world but within a decade or two — and in the mobile phone's case, faster and deeper than almost anyone predicted.

Start with the internet. At the turn of the millennium, nearly half of Americans were online; in India, Nigeria and Bangladesh, fewer than one person in a hundred was. South Korea, already wiring itself with broadband years ahead of nearly everyone, was on its way to becoming one of the most connected societies on Earth.

Then the curves did what S-curves do: nothing much, and then everything at once. India's line runs flat for fifteen years, then bends sharply upward in the mid-2010s as smartphones and collapsing mobile-data prices brought hundreds of millions of people online within a few years — among the fastest adoptions of any technology by any population, ever.

The poor world did not wait its turn to get online. It changed what getting online meant.

The leapfrog

The deeper story is the device. The rich world reached the internet through a stack of prior infrastructure — copper phone lines, personal computers, desks to put them on. Most of the world had none of that, and it turned out not to matter. The mobile phone leapt over the entire stack.

Kenya became the emblem. In 2007, a Kenyan operator launched M-Pesa, a system for sending money by text message on the simplest of handsets. Within a few years, a country where most people had never held a bank account was moving a meaningful share of its economy through mobile money — pioneering a financial technology the rich world would spend the following decade catching up to.

Find the moment on the mobile chart where the poor world's lines cross into rich-world territory. Kenya today counts more mobile subscriptions than people. A gap that took a century to form in fixed telephony closed within about fifteen years in mobile — a catch-up with little precedent in the history of infrastructure.

Connectivity rewired more than commerce. The Arab Spring of 2011 was organized in no small part over social networks; a decade later, the pandemic turned internet access from a convenience into the precondition for school, work and public life — and made every gap in these adoption curves suddenly legible as a gap in opportunity. What the chart records as a percentage, lived experience records as who can see a doctor, sit an exam or reach a customer.

None of this means the digital divide is finished. Roughly a third of humanity remains offline, speed and cost still track income, and the last stretch of every S-curve — rural, poor, older, disproportionately female — is the hardest to climb. The curves flatten near the top precisely where the stakes are highest.

But as a chapter in the long history of technology and inequality, this one reads differently from most. For once, the gap did not widen before it narrowed. The curve simply started later — and then moved faster.

Every figure identifies its source. See SPHRE sources and methodology.