The Dutch Became the Tallest Nation

How the Dutch Became the Tallest Nation on Earth

Studying the history of a country’s physical health can be challenging, as consistently collected indicators of health are hard to come by. However, our recent study looked at the clear link between a population’s health and one simple, widely recorded piece of information – body height.

The Dutch Height Revolution

For most of human history, height remained relatively stable. Until 1800, the average height in Europe hovered between 165 cm and 170 cm, but over the past 200 years something remarkable has happened: heights, globally but particularly in Europe, have increased dramatically. Many European countries saw increases in average heights of over 15 cm, and this has been especially evident in the Netherlands – the average Dutch man has grown from 166 cm in 1810 to 184 cm today, an increase of 18 cm in just two centuries. Dutch men are currently the tallest in the world.

While genetics undoubtedly plays a leading role in determining individuals’ heights, this tremendous change across an entire population cannot be explained by evolution alone – if that were the case, the change in height would have occurred over a much longer timescale.

However, over the last 200 years the Netherlands has, like much of the rest of the world, experienced a huge improvement in all aspects of living standards, from reduced rates of excess mortality and infectious diseases, to greater access to high-quality food. Their rapid increase in height therefore shows a clear link between living environments and healthier, taller populations.

Height, Health, and Development

Body height and health are driven by similar factors during development, the most important being nutrition. To grow and be healthy, people need to fuel their bodies with food.

However, this energy can be sapped by other demands which divert it from growth – factors like illness, stress, and heavy manual labor can all result in shorter populations.

Recent research shows that long-lasting or recurring illnesses were associated with shorter adult heights in the Netherlands in the 19th century, while shorter, one-off periods of illness may have actually been helpful for growth. This is likely because less severe illnesses boosted immunity against future infections.

The deaths of parents, particularly of mothers, have also been shown to result in shorter heights. For very young children, this would have been because they depend on their mothers for nutrition, but it was also true for older children, indicating the profound stress of losing a primary caregiver.

Curiously, although losing a mother was linked to shorter children’s heights – in the Netherlands and elsewhere – losing a father was not, potentially due to the gendered nature of parental care in this period.

Taken as a whole, height can therefore be seen as a reflection of the quality and quantity of food an individual consumed during development – and the absence of stressing factors that divert the energy derived from it – from birth until the end of puberty.

Height and Health in Adulthood

In terms of measuring health in adults, height is a more complex issue. Today, people above average height – men in particular – tend to have an overall lower risk of death. However, extremely tall people (190 cm and taller) tend to have a slightly higher risk of death, mainly because they have an increased risk of cancer-related mortality. This is thought to be a question of body mass – taller bodies have more cells and more cell divisions, meaning a greater chance of developing cancer. Taller people also tend to eat more calories, which could also play a role.

When looking at historical (i.e. pre-World War II) populations, the findings are even more complex: taller people, both men and women alike, tended to die at younger ages, even those who would be considered relatively short today (such as women who are 155 cm). Their increased mortality rates were likely because shorter people require fewer calories than their taller peers. In periods of food scarcity, which were more common in the past, shorter people were therefore at a lower risk of malnutrition.

In historical populations, infectious disease deaths were also more common than they are today, and the combination of these two factors meant an increased risk of death for taller people.

Tales of Tallness Today – and in the Future

While our own research has focused on height’s relevance to the study of the past, it also has significant implications for healthcare today, especially in areas that are hard to reach or monitor. Currently, the World Health Organisation collects data on child stunting, or whether or not a child has fallen behind on what is considered a healthy growth curve. This data is widely used to estimate levels of malnutrition within a country or region.

In the Netherlands, children are now shorter than their parents, but it is unclear what has caused the giants of the modern world to shrink. This begs a number of serious questions: Has diet quality declined? Is childhood obesity impeding growth? Unraveling why populations grow – or shrink – may help us to understand health on a national, rather than individual level.

Conclusion

The Dutch are the tallest nation on Earth, with an average height of 184 cm. But how did this come to be? By studying the link between height and health, we can gain insights into the impact of living standards and environmental factors on population health.

FAQs

Q: What is the main driver of height growth in humans?
A: Nutrition is the main driver of height growth in humans. A well-balanced diet that provides adequate nutrients is essential for growth and development.

Q: Why did the Dutch experience such a rapid increase in height?
A: The Netherlands experienced a huge improvement in all aspects of living standards, including reduced rates of excess mortality and infectious diseases, to greater access to high-quality food. This led to a rapid increase in height.

Q: What is the link between height and health in adulthood?
A: While people above average height tend to have an overall lower risk of death, extremely tall people may have a slightly higher risk of death due to an increased risk of cancer-related mortality.

Q: Why did shorter people have a lower risk of malnutrition in the past?
A: Shorter people required fewer calories than their taller peers, making them less susceptible to malnutrition in periods of food scarcity.

Q: What is the significance of child stunting in healthcare?
A: Child stunting is a key indicator of malnutrition, and data on child stunting is widely used to estimate levels of malnutrition within a country or region.