This looks like an interesting book, Parris addresses a subject that seems obvious, but is almost problematic; does a tougher, challenging childhood make adults stronger and beget genius? In this specific case the focus is on selected 'great lives' selected from his BBC Radio 4 show.
The following review was mostly written before I finished reading Fracture, included here as as warning to my hubris and impatience!
I enjoyed a lot of these mini biographies, a great variety of lives all more-or-less touched by tragedy. Parrish maintains all along that hardship, loss, illness, and other traumas - i.e. Fractures - in childhood [mostly] provided the spark for a remarkable life. However, there is a problem defining genius and the non-scientific trap, correlation isn’t causation … it would be impossible to prove in any ethical laboratory experiment (see later). Rather than more selective examples I would have liked a view or views from experts in genetics, psychology, and anthropology, maybe, and even examples from other species might add some legitimacy to the hypothesis. It worries me that the opposite, a safe, healthy, and loving childhood - which is really the acme of good parenting and an advanced society - would doom the majority of the population to mediocrity?
So an apology, Parrish does include a Science chapter at end of the book, unfortunately research is inconclusive or discredited, focussing on quantitive data or drifting into the troubling implications of a genetic predisposition. The psychopathy of ‘diversifying’ experiences, and the brain's unconscious response to trauma, include attempts to repair the psyche, look for different solutions (including scientific and creative endeavours), or altering our sense of self. In hindsight this probably needs a different book to fully explore; so thank you to the author for the potted biographies and similar themes in fairy stories, myths, legends, and religion … many of which start with (or are predicated on) a lost, broken-down, or traumatised child making good.