By James Kalb, Crisis Magazine - But is all this a good idea? The demand for a radical reduction of controls on immigration is very recent, and no one seems to have thought it through, even though it is (like most political issues) a matter of prudential judgement… For starters, the Catechism states that more prosperous nations are obliged, to the extent they are able, to welcome the foreigner … [but] political authorities, for the sake of the common good for which they are responsible, may make the exercise of the right to immigrate subject to various juridical conditions.