Solidarity is the most important.

At my friend's wedding last weekend, I had the great pleasure of dining with two African immigrants, one from Sudan and one from Tanzania. During the course of our animated dinner conversation I learned that the first worked as a letter carrier while the second worked construction, rising at 4am every day to catch a bus to the building site.

I was surprised that these two intelligent and capable men were not better employed, but their situation is a common one: trapped in a global underclass, people travel between countries in search of better economic