I think a person's trajectory can introduce some biases. In antiquity, culture and economics changed more slowly. The same people did the same jobs, often by he

I think a person's trajectory can introduce some biases. In antiquity, culture and economics changed more slowly. The same people did the same jobs, often by heredity. Now things move so fast it's entirely reasonable for kids to assume they may have a career path that doesn't yet exist. The pioneers of the previous generation who built up now well-established industries with their skilled colleagues are no longer on the edge. Their pool of applicants has changed because they have become the safe bet. The highly skilled youth are off elsewhere carving out their own niches.