Cultural bias. The author opens by noting how many cultures have linked the right side with goodness and skill and the left with weakness or evil: in language ("dexterous" vs. "sinister"), religious art, customs and even politics. Parents raised with these associations often nudge a left-leaning child toward the right hand, sometimes with pressure or impatience, arguing that the world is built for right-handers.
Don't force a switch. Psychology now recognizes there is no valid reason to change a child's preferred hand. Left-handed people can do everything, including using tools designed for right-handers, and many people mix hands for different tasks. Most children show a clear preference by about age four; ambidextrous children usually have to choose when they learn to write. Pressuring a child to use the right hand can disrupt motor development and teaches the child that something about their nature is wrong, which damages self-esteem.
Her view of left-handedness and the brain. The author links left-handedness to right-hemisphere dominance and therefore to creativity, emotion, intuition and artistic ability, and suggests left-handed children may need extra support in math and other rigorous subjects. She recommends that parents of children struggling with math or reading look into activities that stimulate left-hemisphere skills.
A case of mixed messages. A mother insisted her shy six-year-old was right-handed because no one in the family was left-handed, while his teacher ignored the issue. Testing showed he was left-handed. Caught between the two adults, he told the evaluator that both his hands were "bad": the left because it wanted to do everything, the right because it couldn't do anything well. The author says this kind of conflict leaves a child anxious, ashamed and with low self-esteem. Teachers once tied children's left hands down or struck them with rulers; today the advice is to respect the child's natural tendency.
Copying a parent. Eric, almost four, suddenly switched to his left hand to write "like Dad," his left-handed father. At that age boys imitate their fathers as part of identifying as male, and he had concluded men are left-handed and women right-handed. If he's naturally right-handed, the switch is likely to pass on its own.
She closes by noting that left-handed people often become artists, designers, actors, musicians or intuitive businesspeople.
Note: The link between handedness, hemisphere dominance and personality or math ability is a simplification; research doesn't support predicting a child's talents from handedness. The core advice, don't force a left-handed child to switch, is consistent with current guidance.