Counterfactual
The Parallel Lives of Isabella and Mary
In 10,666 girls, Isabella found its level. 50 years earlier, Mary occupied that same statistical address.
1880–2025
Isabella
Peak year
2010
Peak births
22,936
Latest count
10,666
Status
Declining
Peak generation
Gen Z
1880–2025
Mary
Peak year
1921
Peak births
73,984
Latest count
2,230
Status
Endangered
Peak generation
Greatest Generation
In 10,666 girls, Isabella found its level. 50 years earlier, Mary occupied that same address. One peaked in the Greatest Generation era; the other in the Gen Z world. They never met. But the data remembers them both.