Lead
At the playground, your child's hand reaches for another child's toy. You move to stop it. Before you get there, your child bites the other child's arm. The daycare notebook arrives home with a note: "Your child hit a friend today." At home, the moment you put them down from your arms, they bite your thigh.
Between around 12 months and the end of the second year, this kind of behavior can crowd out everything else in a parent's mind. Is my child too rough? Am I doing something wrong? Will they grow up to be violent? Parenting books offer competing instructions — scold, don't scold, redirect, verbalize feelings — without agreeing on much.
This article rereads physical aggression in one-year-olds not as a failure of discipline but as a phase of development. The aim is to settle a position that is genuinely crowded: "not abnormal, but not something to ignore."