A tall story: Why do the Dutch tower over us?

People walk along the beach at Egmond aan Zee on March 8, 2015, in the Netherlands
People walk along the beach at Egmond aan Zee on March 8, 2015, in the Netherlands

The Netherlands is the land of giants: on average, its women stand almost 1.71 metres (5.6 feet) tall, and its men 1.84 metres.

But how the Dutch became the world's tallest people has been somewhat of a mystery.

After all, two centuries ago they were renowned for being among the shortest. What happened since then?

A popular explanation is nutrition—a calorie-stuffed diet rich in meat and dairy products.

But that can't be the whole story, experts say.

Other European countries, too, have enjoyed similar prosperity and a rise in living standards, yet their citizens have not shot skywards as much.

The average male height in the Netherlands has gained 20 cm (eight inches) in the last 150 years, according to military records.

By comparison, the height of the average American man has risen a mere six cm over the same period.

Researchers led by Gert Stulp, a specialist in population health at the London School of Hygiene and Tropical Medicine, combed a Dutch database for clues.

Called LifeLines, the record contains exhaustive detail about the lives and health of more than 94,500 people who lived in the northern the Netherlands from 1935 to 1967.

In this three-decade snapshot, the people who had the most children were tall men, and women of average height, the team found.

For example, the most fertile men were 7 cm above the average height. Statistically, they had 0.24 more children on average than the least fertile men, who were about 14 cm below the average height.

Compared to counterparts in other countries where they often tended to have fewer children, taller women also reproduced more in the Netherlands.

Many postponed having children until after their studies, but once they forged a successful relationship, often had a large family.

The study did not involve genetic testing, but concluded from the observations that must have played a part: with time, more and more Dutch started sporting tall genes.

"Natural selection in addition to good environmental conditions may help explain why the Dutch are so tall," said the study published Wednesday in the Royal Society journal Proceedings B.

Tall, tallest, taller

"Height is very heritable—taller parents tend to have somewhat taller children than shorter parents," Stulp told AFP by email.

"Because taller individuals would have more offspring in the next generation who would be taller, the average height in that generation would a bit taller on average than the preceding generation, if all else is equal."

There seems to be a cultural preference as well.

Stulp pointed to figures showing that, in the United States, shorter women and men of have the most reproductive success.

"There is much variation in what and women want," he said.

"When it comes to choosing a mate, height tends to have (only) a small effect, which is not very surprising given the many other, more important, traits people value in their mate."


Explore further

Shorter woman, taller man: Preferences for partner height translate into actual partner choices

More information: Proceedings of the Royal Society B, rspb.royalsocietypublishing.or … .1098/rspb.2015.0211

© 2015 AFP

Citation: A tall story: Why do the Dutch tower over us? (2015, April 7) retrieved 23 July 2019 from https://phys.org/news/2015-04-tall-story-dutch-tower.html
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Apr 08, 2015
"When it comes to choosing a mate, height tends to have (only) a small effect, which is not very surprising given the many other, more important, traits people value in their mate."

I think this may be wrong. Most all women I've ever spoken to have a preference for a taller mate than themselves. Which would very well mesh with their other finding:
in the United States, shorter women and men of average height have the most reproductive success.

Its also a question of mobility and population distribution. In the Netherlands the population is concentrated in very few centers and even those living in the countryside have easy access to cities (i.e. to a 'large breeding pool'). In the US that is not the case. So I find it not surprising that the development would be more extreme in a small country than a large one.

cjn
Apr 08, 2015
@antialias

I have also not seen a more homogenous population in all of my traveling. Their plainness makes white bread look exotic. This makes me think that the narrowness of the aforementioned 'pool' is reinforced by a preferential selection for very-like mates; whereas many other heterogeneous populations like the US limit the bottlenecking/spiking of particular traits.

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