Counterfactual
The Parallel Lives of Atley and Sierra
In 76 girls, Atley found its level. 50 years earlier, Sierra occupied that same statistical address.
1999–2025
Atley
Peak year
2019
Peak births
80
Latest count
76
Status
Stable
Peak generation
Gen Alpha
1940–2025
Sierra
Peak year
1998
Peak births
5,841
Latest count
476
Status
Endangered
Peak generation
Gen Z
In 76 girls, Atley found its level. 50 years earlier, Sierra occupied that same address. One peaked in the Gen Z era; the other in the Gen Alpha world. They never met. But the data remembers them both.