I’ve been teaching brain-drain related issues this week. Some of the big questions there are empirical ones, and the facts are contested. But some of the normative issues are interesting, and some of them don’t just apply to poor countries. One of these issues is the apparent clash between our duties to compatriots (if we have any) and our rights of exit and expatriation. If I have a duty as a member of an institutional scheme to contribute to the well-being of the least advantaged members of my society, can I just divest myself of that duty (in one bound, as it were) by leaving the country, or, to go one step further, by renouncing my nationality? It was a puzzle that Henry Sigdwick was defeated by back in 1907 [or somewhat earlier in fact, as he died in 1900!]:

> `In 1868 it was affirmed, in an Act passed by the Congress of the United States, that ‘the right of expatriation is a natural and inherent right of all people.’ I do not know how far this would be taken to imply that a man has a moral right to leave his country whenever he finds it convenient—provided no claims except those of Patriotism retain him there. But if it was intended to imply this, I think the statement would not be accepted in Europe without important limitations: though I cannot
state any generally accepted principle from which such limitations could be clearly deduced.” Henry Sidgwick, *The Methods of Ethics*, 7th ed (1907)
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