From outlaws to rights-holders: the evolving legal status of the alien

Health · Published 7 October 2026 Swipe more like this →

In short: Historically viewed as enemies or even natural slaves, foreign-born residents have undergone a profound legal transformation. While modern international law asserts certain natural rights for all, the tension between economic necessity and national protection continues to shape the boundaries of citizenship and belonging.

In the ancient world, the legal status of the 'alien'—a foreign-resident not part of a nation by birth or naturalization—was often precarious. Aristotle, for instance, viewed non-Greeks as inherently 'barbarous' and naturally enslaved. While Roman 'jus gentium' began to extend certain rights to foreigners, and later Christian doctrines promoted human unity, the modern concept of universal natural rights is a relatively recent development in international law.

The legal landscape is defined by a tug-of-war between humanitarian standards and national sovereignty. While founders of international law asserted that certain rights should be vested in all persons regardless of citizenship, a 'minimum standard' of treatment does not necessarily grant aliens the right to own land or practice specific professions. To bypass these restrictions, many states entered into bilateral treaties to ensure their nationals could access foreign courts, worship freely, and engage in trade on equal footing with locals.

Today, this tension manifests in complex regulatory frameworks. In the United States, while the Constitution protects aliens from certain abuses, such as being deprived of property without compensation, their right to remain is a matter of 'permission and tolerance' granted by Congress. Conversely, economic needs often drive liberalization, such as the European Common Market treaty, which allows member-state citizens to reside and work freely across borders. However, nations still use municipal law to protect domestic jobs and industries from foreign competition, maintaining a strict boundary between the citizen and the outsider.

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