Generations Used to Be Defined by Events. Now They Are Defined by Devices
The first three named generations are defined by depression and war. The last five by internet, smartphone and AI. Gen X is the hinge — the last analogue childhood.
The three oldest named generations are defined by depression, war and post-war prosperity, while the five since Generation X are each defined by a technology — a shift in what a generational label even claims.
Every generation profile on this site carries a one-line description of the shift that defines it. Read all eight in order and something changes halfway down.
The eight, in order
| Generation | Born | The defining shift |
|---|---|---|
| Greatest | 1901–1927 | Depression, world war, post-war reconstruction |
| Silent | 1928–1945 | Depression and war childhoods |
| Baby Boomers | 1946–1964 | Post-war prosperity and the birth spike |
| Generation X | 1965–1980 | The last analogue childhood |
| Millennials | 1981–1996 | Came of age with the commercial internet |
| Generation Z | 1997–2009 | First cohort to reach adolescence with a smartphone |
| Generation Alpha | 2010–2024 | First generation born entirely in the 21st century |
| Generation Beta | 2025–2039 | Generative AI as ambient infrastructure |
The first three are events. The last four are technologies. Generation X is the hinge — the only one defined by the absence of a technology rather than the arrival of one.
Why the swap matters
An event and a technology are not equally good at defining a cohort, and the difference is not stylistic.
An event has a date and reaches everyone. A war or a depression arrives in a country in a particular year and reaches the rich and the poor, the city and the village, on roughly the same timetable. A cohort defined that way genuinely shares something.
A technology arrives unevenly, and the unevenness is enormous. Internet use ranges from 100% in the United Arab Emirates to 7% in South Sudan. A label like "the smartphone generation" describes some of the cohort precisely and others not at all — which is the central problem with the phrase "digital native".
So the newer labels make a weaker claim than the older ones, while sounding like a stronger one.
The other thing that changed
The older shifts describe what happened to a cohort. The newer ones describe what a cohort was handed.
That is a change in who the sentence is about. "Depression and war childhoods" is a statement about circumstances nobody chose. "First cohort to reach adolescence with a smartphone" is a statement about a product decision made by adults, and it locates the defining feature of a generation in something sold to them.
Both can be true. But the second kind of definition ages differently: the technology keeps changing, and each new cohort gets defined by whatever launched during its adolescence — which is a naming convention, not a finding about people.
What it means for Alpha and Beta
Generation Alpha's shift — "the first generation born entirely in the 21st century" — is the weakest on the table, because it is a calendar fact rather than an experience. It says nothing about the children.
Generation Beta's is stronger and also the least tested. Generative AI became publicly available three years before the first Beta was born, so none of them will remember its arrival. Whether that produces a cohort that differs from the one before it is an open question, and the honest position for the next decade is that nobody knows.
The oldest Beta is one year old. Everything written about what they are like is a projection from what they were handed.
See how the boundaries were drawn at what generation am I, or which comparisons between them are worth making at which generation comparisons mean anything.