memes

Maturity comes from life experience and plenty of people mature very quickly in periods of adversity, while their peers linger in childhood or adolescence because there's no stressors propelling them onward.

I should note that "maturity" isn't some kind of universal good, either. A person regularly subjected to physical violence will learn coping mechanisms to avoid or endure that abuse. They'll come out with these reflexes and responses that other adults can read as "mature". But I wouldn't say they're better for it.

Similarly, people who endure poverty have to learn mature habits as a method of survival far sooner than their wealthier peers - how to provide food and shelter for yourself, how to navigate social bureaucracies, how to operate motor vehicles safely. But the techniques they adopt - lying, stealing, driving without any formal training - aren't condusive to a safe neighborhood or a functional social network.