Dr Eliza Filby on Instagram: "I write in Inheritocracy about a new life stage I call Kidulthood (18–35). First visible among Gen X, but especially pronounced in Millennials and Gen Z. It’s when the milestones of traditional adulthood, like finishing education, moving in with a partner, having children, becoming financially independent, are all happening later than they did for Boomers. Everyone assumes delayed adulthood today is to do with economic constraints, but it’s also about increasing fre