A lot of people think they need to do this but it's really not true. You don't need to have life all figured out before you have kids. And in terms of avoiding complications and having energy, 18-25 years old is probably the best time.

In my city of Seattle you simply cannot have more than one kid in your twenties. You simply do not have the income to pay the Seattle rent / mortgages and pay daycare for more than one kid at the start of your career. Forget about going to a concert or a restaurant: there is simply no money for it.

Young people in Seattle either live in studios or 1 bedroom apartments, or live with roommates, or with their parents. You cannot raise more than 1 kid this way.

This is the calculus me nu my wife did when we chose to have one kid only. Looking back and seeing how life progressed we made the right choice.

Maybe that is exactly the mechanism this happens with. People don't necessarily make these choices consciously, they might be railroaded into them by the environment in an industrialized society

You don't need to have life figured out before you have kids in the same sense you don't have to fix your car when the check engine light is on, or you don't have to replace a rusted water boiler. You won't immediately die from it. You can do it for years without issue if you're lucky, and many people do exactly that. But if you're in a position you can sort things out properly without financial strain, everyone will tell you to sort this out ASAP and you're stupid if you don't.

The problem is that it's literally impossible for most people to have life figured out before hitting 25, and very hard before 30. Importantly, that wasn't the case just one generation ago.

I have more energy in my 30s than my 20s

> You don't need to have life all figured out before you have kids.

Sure, you just need to do away with international trips, going out, losing your group of friends, losing your chances for higher education and career progression and all of the associated prestige.