This is a moral concern, but it also has strategic consequences, because radical Islamism, like any aggressive creed, tends to spill over borders, in the form of ideological influence (Saudi Arabia, Pakistan), terrorism (Iran, Afghanistan), or metastasized civil war (Sudan).
But when there's no communal space, or a place for kids to play, that tends to spill out onto the street".
If anything, innovation tends to spill backward these days, with the military finding new uses for technologies developed by civilian businesses.
London's economic growth is concentrated in the middle: it tends to spill only as far as central spots like Shoreditch and King's Cross.
As in Kenya, where Somali refugees have fed tensions between Muslims and Christians, the conflict in one country tends to spill over next door.
Next door is a cocktail bar that tends to spill out on to the street in the summer months, creating a nice buzz.
The effect of Sarbanes-Oxley has also been felt by European companies that are listed on the New York Stock Exchange, or simply deal with other companies that are listed there, an example of the way national regulation tends to spill across borders.Conversely, the European Union's efforts to develop a single market for financial services are producing some fall-out in America too.
It is not a coincidence for example that almost all cups are roundly shaped: a cup with a square section is not practical to grasp, it does not match the lips' shape and water tends to spill out at the edges.
If food tends to spill on clothing, it's much more dignified to place a large napkin over the front of someone's shirt and an additional one on their lap versus rely on a bib.
