It was as if something in him cracked open. In his mindâs eye, he saw the same scene another generation back: his mum as pink smudge, being held by a nana far younger than he was now. And then the baby nana being held by great-grandma, and so on, back and back through the millennia. It was like the regular ticking of a clock and each tick a human generation. He understood, so abruptly it hurt, that he was not, as heâd always assumed, an individual. He was like one of Mendelâs peas in GCSE biology, just one of a row of seedlings in which the inherited traits â a nose, a talent, a sense of humour â were recombined and passed forward again. He was like a fish whoâd always believed he moved for his own reasons but now realised he was just one iridescent shimmer in the shoal.