"French parents, Druckerman observes, love their children just as much as American parents. They give them piano lessons, take them to sports practice, and encourage them to make the most of their talents. But French parents have a different philosophy of discipline. Consistently enforced limits, in the French view, make children feel safe and secure. Clear limits, they believe, actually make a child feel happier and safer—something that is congruent with my own experience as both a therapist and a parent. Finally, French parents believe that hearing the word "no" rescues children from the "tyranny of their own desires." And spanking, when used judiciously, is not considered child abuse in France.
As a therapist who works with children, it makes perfect sense to me that French children don't need medications to control their behavior because they learn self-control early in their lives. The children grow up in families in which the rules are well-understood, and a clear family hierarchy is firmly in place. In French families, as Druckerman describes them, parents are firmly in charge of their kids—instead of the American family style, in which the situation is all too often vice versa."
Why French Kids Don't Have ADHD | Psychology Today