Borders define geographic boundaries of political entities or legal jurisdictions, such as governments, states or subnational administrative divisions. They may foster the setting up of buffer zones. Some borders are fully or partially controlled, and may be crossed legally only at designated crossing points.

In the past many borders were not clearly defined lines, but were neutral zones called marchlands. This has been reflected in recent times with the neutral zones that were set up along part of Saudi Arabia\'s borders with Kuwait and Iraq (however, these zones no longer exist). In modern times the concept of a marchland has been replaced by that of the clearly defined and demarcated border.

For the purposes of border control, airports and seaports are also classed as borders. Most countries have some form of border control to restrict or limit the movement of people, animals and goods into or out of the country. Under international law, each country is generally permitted to define the conditions which have to be met by a person to legally cross its borders by its own laws, and to prevent persons from crossing its border when this happens in violation of those laws.

In order to cross borders, the presentation of passports and visas or other appropriate forms of identity document is required by some legal orders. To stay or work within a country\'s borders aliens (foreign persons) may need special immigration documents or permits that authorise them to do so.

Moving goods across a border often requires the payment of excise tax, often collected by customs officials. Animals (and occasionally humans) moving across borders may need to go into quarantine to prevent the spread of exotic or infectious diseases. Most countries prohibit carrying illegal drugs or endangered animals across their borders. Moving goods, animals or people illegally across a border, without declaring them, seeking permission, or deliberately evading official inspection constitutes smuggling.

Border economics

The presence of borders often fosters certain economic features or anomalies. Wherever two jurisdictions come into contact, special economic opportunities arise for border trade. Smuggling provides a classic case; contrariwise, a border region may flourish on the provision of excise or of import–export services — legal or quasi-legal, corrupt or corruption-free. Different regulations on either side of a border may encourage services to position themselves at or near that border: thus the provision of pornography, of prostitution, of alcohol and/or of narcotics may cluster around borders, city limits, county lines, ports and airports. In a more planned and official context, Special Economic Zones (SEZs) often tend to cluster near borders or ports.

Human economic traffic across borders (apart from kidnapping), may involve mass commuting between workplaces and residential settlements. The removal of internal barriers to commerce, as in France after the French Revolution or in Europe since the 1940s, de-emphasises border-based economic activity and fosters free trade.

Border politics

Political borders have a variety of meanings for those whom they affect. Many borders in the world have checkpoints where border control agents inspect those crossing the boundary.

In much of Europe, such controls were abolished by the Schengen Agreement and subsequent European Union legislation. Since the Treaty of Amsterdam, the competence to pass laws on crossing internal and external boders within the European Union and the associated Schengen States (Iceland, Norway, Switzerland, and Liechtenstein) lies exclusively within the jurisdiction of the European Union, except where states have used a specific right to opt-out (United Kingdom and Ireland, which maintain a common travel area amongst themselves). For details, see Schengen Agreement.

The United States has notably increased measures taken in border control on the Canada–United States border and the United States–Mexico border during its War on Terrorism. Some have called the 3600-km (2000-mile) US-Mexico border, "the world\'s longest boundary between a First World and Third World country."Murphy, Cullen. Roman Empire: gold standard of immigration. Los Angeles Times, June 16, 2007 (accessed here June 20, 2007)

Historic borders such as the Great Wall of China, the Maginot Line, and Hadrian\'s Wall have played a great many roles and been marked in different ways. While the stone walls, the Great Wall of China and the Roman Hadrian\'s Wall in Britain had military functions, the entirety of the Roman borders were very porous, a policy which encouraged Roman economic activity with its neighborsMurphy 2007. On the other hand, a b

rder like the Maginot Line was entirely military and was meant to prevent any access in what was to be World War II to France by its neighbor, Germany.

Image gallery

The follwing pictures show in how many different ways international and regional borders can be closed off, monitored, at least marked as such, or simply unremarkable.

Tijuana-san diego border deaths.jpg Border at Tijuana, Mexico and San Diego, USA	Frontera España-Marruecos, por Ceuta.jpg Ceuta border fence between Spain and Morocco.	Berlinermauer.jpg The Berlin Wall used to be one of the most famous guarded borders in the world.	Alabama the beautiful.JPG A sign welcoming visitors to the U.S. state of Alabama.
NicholasCountySignWV.jpg Several markers designating the border between Nicholas and Greenbrier counties in West Virginia, USA along a secondary road. Notice the older stone survey markers a few meters behind the modern highway sign.	OffeneGrenzeNiederndorf-Oberaudorf.jpg A typical Schengen internal border (here near Kufstein between Germany and Austria): the traffic island marks the spot where a control post once stood; it was removed in 2000.	Self-illuminating Border flower pot between Burghausen, Salzach in Germany and Ach in Austria.	B1 Anfang Aachen 01.jpg A border within a closely built-up area – here near Aachen between Germany and the Netherlands: Take the left lane in the Netherlands to actually turn left in Germany.
Baarle-Nassau frontière café.jpg Border between the Netherlands and Belgium next to a street café.	Eurode-Business-Center.jpg The border between the Netherlands and Germany crosses through this building of the Eurode Business Centre in Kerkrade and Herzogenrath.	Karigasniemi Finland Bridge over Inarijoki.jpg The bridge over the Inari River in Karigasniemi, on the border of Finland and Norway.	Border stone.JPG Border stone at Passo San Giacomo between Val Formazza in Italy and Val Bedretto in Switzerland.

References

See also

Look up border in
Wiktionary, the free dictionary.

Wikimedia Commons has media related to:

Border

• Collection of pictures of European borders, mainly intra-Schengen borders
• [1]Dissertation topic in architecture. Nicolas Pannetier and Simon Brunel travelled through a geographical incarnation of a border, which has disappeared today, between Swinoujscie et San Bartolomeo. They were interested in its physical and symbolical outcome with the aim to collect a memory of these spaces. 2006-2007.
• Geopolitics
• List of land border lengths
• List of countries that border only one other country
• List of national four-country border sets
• List of national border changes since World War I
• Political geography
• Political science
• Talking Borders Queen\'s University Belfast online audio archive

This article is licensed under the GNU Free Documentation License. It uses material from Wikipedia

This article is licensed under the GNU Free Documentation License. It uses material from Wikipedia