Most commentators look at the issue of immigration from the viewpoint of immediate politics.
Migrations and Cultures: -shows the persistence of cultural traits, in particular racial and ethnic groups, and the role these groups\' relocations play in redistributing skills, knowledge,.
Now Thomas Sowell offers a sweeping historical and global look at a large number of Migrations over a long period of time.
In doing so, they focus on only a piece of the issue and lose touch with the larger picture.
Most commentators look at the issue of immigration from the viewpoint of immediate politics