A recent study in England showed that a 20-year-old soldier during the First World War averaged 168 cm, which is 10 cm less than a modern British soldier. Such dynamics is typical not only for Foggy Albion, but also for the French, Italians and Swedes, while the Danes and Spaniards have grown by 12.5 cm during this time.
One of the most important factors affecting growth is the biological standard of living. So during the formation of capitalism, average growth decreased. On the other hand, in the 20th century in developed European countries and the United States, with rising incomes, nutrition has significantly improved, which did not slow down to affect the increase in average growth.
Respiratory and gastrointestinal infections among children, especially pneumonia, bronchitis, diarrhea and dysentery, have negatively affected human growth in the past. An equally important factor has been the reduction in prison overcrowding.
According to the results of the census of military personnel in 1901, it turned out that young men from middle-class families were taller than their peers from large families. Today, other factors, such as advances in medicine and education, contribute to an increase in average height. It turned out that educated parents had higher servicemen.