We have to start counting from 1 again.

There are 8 billion of us alive today, give or take a few hundred million. We crowd cities, cross oceans in mere hours, and argue through glowing screens. That certainly sounds like a lot of people, ...

It’s a question most people instinctively push aside: Are there simply too many of us? For years, that idea felt exaggerated—something debated in academic circles but rarely taken seriously in ...