“Milk has been a key growth factor, be it in Japan or in the Netherlands. Before the Second World War, Dutch males were smaller than American men, but post-1950 US milk consumption declined while in the Netherlands it rose until the 1960s—and it remains higher than in the US. The lesson is obvious: the easiest way to improve a child’s chances of growing taller is for them to drink more milk. Is life expectancy finally topping out?”