Since the 1950s large-scale immigration to Britain has mainly been from Africa, the Caribbean and South Asia, meaning that arguments about immigration have been racially charged (indeed, plenty of politicians have deliberately conflated the issues).

ECONOMIST: Immigration trends

Despite frequent attempts to staunch immigration from the south or divert it into legal channels, the supply of Mexican labour has continued to find ways to get in touch with American demand.

ECONOMIST: America's population

These codes will help sort the new state's international post, mark out its citizens in immigration databases and allow the South Sudan pound to feature on international exchanges when it launches in July.

ECONOMIST: How to start a nation: Trappings of state | The

Except to say this: Stricter border control, okay, but the only way out of this mess, the only permanent and peaceful answer to illegal immigration, is capitalistic reform south of the border.

FORBES: California Leavin'

Yet increasingly, it appears that red states in the interior and the south may actually have more to gain from liberalized immigration than many blue state bastions.

FORBES: Why The Red States Will Profit Most From More U.S. Immigration

Patrick Harvie, the co-convener of the Scottish Green Party, said that attitudes to immigration differed in Scotland, as well as economic needs north and south of the border.

BBC: Humza Yousaf criticises UK immigration policies

The standstill, according to the report, results from declining immigration from Mexico paired with a rising number of people returning south from the U.S. Those trends recently converged, and between 2005 and 2010 about as many Mexicans left the U.S. as flocked here.

WSJ: Mexican Immigration Wave Winds Down

On June 7 the Population, Immigration and Border Authority said that 1, 5000 South Sudanese have one week to leave Israel of their own accord or face deportation.

FORBES: Migrant Rape Furor in Israel Makes This Job Harder