Inventing Ourselves
by Sarah-Jayne Blakemore
Summary
Blakemore's opening move is to take the most mocked demographic on earth and declare the mockery a scientific error. The teenage brain is not a broken adult brain, her book argues from two decades of research, much of it her own: adolescence is a distinct, necessary developmental stage, sculpted by evolution to do exactly what it does, and the behaviours adults ridicule, the risk taking, the sleep, the self consciousness, the peer obsession, are its features working as designed.
The science is delivered through the experiments. Brain imaging shows the prefrontal cortex, the planner and brake, still remodelling into the mid twenties while the reward system runs ahead, a developmental mismatch with predictable consequences. Her lab's studies show teenagers reason about risk perfectly well alone, and differently the moment peers are watching, because for an adolescent, social exclusion is registered as a threat on a par with physical danger, an audience effect the book treats with respect rather than exasperation. The self is literally under construction, the medial prefrontal cortex lighting up to questions of identity in ways it never will again, which is why the friendships burn hotter and the embarrassments cut deeper.
The argument keeps its practical edges: school start times against adolescent sleep biology, the vulnerability window in which most mental illness begins, and the criminal justice implications of a brain still being built.
Around two hundred and fifty pages, warm and evidence dense.
Best for readers who live or work with teenagers, and for anyone who was one and would like the affectionate scientific explanation.
Historical Context & Significance
Inventing Ourselves won the Royal Society prize in 2018, the judges calling it a completely captivating read by the field's leading expert, and the description was literal: Sarah-Jayne Blakemore, then at University College London and subsequently professor of psychology at Cambridge, had done much of the foundational work on the adolescent social brain that the book reports, her TED talk on the subject having already reached millions.
The win registered a shift in the prize's centre of gravity toward books with public consequences: the research the book carries has fed real arguments about school hours, mental health services, and the age boundaries of criminal responsibility, and Blakemore became the standard expert voice whenever teenagers made policy news.
Its cultural work may be the most durable: the book gave a generation of parents and teachers a frame that replaced hormonal write offs with developmental respect, and adolescent neuroscience, a backwater when she entered it, is now a crowded field she is credited with opening.