My arguments for open immigration have solid economic support. Lant Pritchett, a Harvard Economist, has a book out entitled Let Their People Come (download it for free here), which makes a similar argument.
But for a brief introduction check out this Reason interview with him.
In response to many who doubt the political feasability of more open immigration he says,
Just prior to WWI every single European country had a monarch. Twenty years later the very idea of monarchy was regarded as ridiculous.
This point is helpful to me. My main concern today is that the ideal is seldom articulated or understood.
Without the ideal, it is too easy to compromise in the wrong direction, pulling us further from where we want to go. I have no wisdom concerning particulars of strategy. That sort of thing is best left to political scientists and activists. As someone who wants to be a careful thinker and shape-er of public, especially Christian, opinion I find it more crucial to spend my time on the ideal.
All of the arguments against me which contend “that can never be possible” miss this point about my purpose. They also are a bit short-sighted.
Public opinion changes, often swiftly, and often on a whim, but usually in response to a well articulated argument.