[_98fj]

> It seems that the article is stating that one's attachment system is developed primarily in their first year of life? If attachment theory is true, I would've guessed that the first ten or twelve years of life would all contribute.

Habitual reactions of trust and mistrust are formed at this early age.

But these are just feelings. Children older than babies can start working around them, as their relationships become more complex. They can develop strategies to resolve problems. Find compromises. Work on tensions in their inner life.

Those capabilities are learned over the course of the childhood and they are essential tools for children to grow up and eventually be free of the dictate of their emotions.