To build a wall against Mexico may be a way for Donald Trump to keep his key election promise. But it would not keep out drugs and illegal immigrants.

” A wall is an elegant idea in all its simplicity. But its purpose is pure fantasy. Gränsmurar does not work, says Dudley Poston, a sociologist and demographer, and professor at Texas A&M University.

In the 1950s, there were five or six gränsmurar in the world. Today, there are around 70.

– Wall is the new norm for international relations.

But they don’t work has been known for a very long time, says Dudley Poston, and quote general George Patton:

” Fixed fortifications are a monument to man’s stupidity. If mountain ranges and oceans can be overcome can also all built by the people there.

he was right. Donald Trump likes to refer to the great wall, the Great Wall of China, and has even said that the wall he wants to build along the border with Mexico should be called ”The Great Wall of Trump”.

But the great wall of china was no successful gränsförsvarsanläggning.

In its heyday guarded the great wall of more than a million soldiers, and between two and three million chinese died during the work to build it. It served? No, it did not, says Dudley Poston.

the Wall was built to protect China from enemies from the north. But in the year 1264 invaded the mongols anyway, and their ruler Kublai khan founded the yuan dynasty 1271, who reigned for almost a hundred years. In 1644 came a new invasion from the north, when the manchus took power and founded the Qing dynasty and retained power until 1912.

During the second world war can the wall have intercepted the japanese invasion.

But the japanese found ways to get over, through and around it, and occupied Shanghai in 1937, and subsequently large parts of China.

the 118-kilometer-long defensive wall from coast to coast through the current north of England, began in the year 122 on the orders of the roman emperor Hadrian to protect the Roman empire’s northernmost border.

” It was a very successful wall, because there never were any threats, says Dudley Poston.

the Same cannot be said about the maginot line, befästningssystemet with the underground fort that France built along its border with Germany between 1929 and 1934 to protect themselves against an invasion.

” So what did Germany? Invaded Belgium to the west and went into France from the north. France had invested so much resources on a useless wall that they could be defeated in a few weeks.

is a 250 kilometre long and four kilometre wide strip of land that divides the Korean peninsula since 1953.

– It is called the demilitarized zone, and is the most fortified and populated international border in the world, ” says Dudley Poston.

Get the tar out of it, so it could be seen as a successful boundary wall.

– it keeps The people inside. Very few sydkoreaner, and very few people in general, want to immigrate to north Korea.

the Same thing can be said about the berlin Wall and the iron curtain.

– the berlin Wall was not the people from East berlin and the iron curtain was able to keep people in Eastern europe rather than to prevent people from getting there, ” says Dudley Poston.

His final example of the failure of the historic walls is Wall Street, which was named after a wall along the northern boundary of the Dutch colony of New Amsterdam in downtown Manhattan.

– It was built to protect against ursprungsamerikaner, pirates and the british. And it really worked not. The british invaded, took over Manhattan and changed the city’s name to New York, ” he says.

so not before, and they will not work in the day, says Dudley Poston. A wall along the U.S. border with Mexico would have severe ecological consequences for animals and plants, as DN reported on earlier. But it would not keep illegal immigrants out, for several reasons.

– People who emigrate from one country to another are usually the most motivated and talented, and smarter than those who stay behind. It doesn’t matter how well-built and impenetrable wall. They will always find ways over, under or through it.

Many of the around 11 million people living illegally in the united states have also entered the country completely legally. 4.5 million people, or more than 40 per cent, have simply stayed after their visa has expired or has in other ways violated the visa regime.

” They flew in on aircraft. A wall can never be high enough to stop it, ” says Dudley Poston.

Those who entered the country illegally came mainly via the border with Mexico. So-called circular migration, that is to say that the people staying and working a few years and then return to their home countries, were more common in the past.

– However, when the limit becomes tighter, guarded stop the migrants. Donald Trump’s wall will reinforce the behavior even more. In one way or another they will get in. The wall will just keep them in the country.

the false perceptions about immigrants, says Dudley Poston, that they take jobs from american citizens.

Demographers have studied this carefully, and seen that almost all the illegal immigrants end up on jobs that other americans don’t want: dirty, difficult and dangerous job, ” he says.

Half of them also pay tax in the united states, and they are not over-represented in crime statistics.

– The vast majority of crimes, including murder and rape, committed by the native americans. Detailed your behalf research has time and again shown that foreign-born have a considerably lower brottstatistik than native-born americans.

”the Wall will stop the drugs from arriving in the country and poison our youth. So we need the wall. It is absolutely necessary,” said Donald Trump at a press conference in August 2017. But also not it is true.

” A wall will not keep the drugs out there. In principle, no drugs at all in the country, with people who cross the border illegally. Most of the time being taken in by mexican drug cartels through the border crossings of trucks, cars or trucks, ” says Dudley Poston.

” My forecast is that if the Trumps wall built clear, in ten years or so, there will be at least as many illegal immigrants as in the day, and maybe a few million, most of whom have settled here permanently. An investment of more than $ 22 billion, with the aim to close people out, instead, to keep people here.

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