How did Joseph Beale’s vested-rights doctrine explain the application of foreign law?

Joseph Beale’s vested-rights doctrine was a territorially oriented theory that shaped American conflict of laws during the first half of the 20th century.

According to this doctrine, legal rights and obligations are created or "vest" at a specific geographic location. Beale argued that once a right was created in one locale, its existence should be recognized and enforced everywhere. Consequently, when a court was faced with a case involving foreign elements, the application of foreign law was justified because that law was the one that governed the territory where the rights of the parties had originally vested.1

This approach prioritized territorial predictability, though it was later criticized for being inflexible and failing to serve the interests of justice in complex cases. This led to the development of "escape devices" and, eventually, the more flexible "most significant relationship" approach found in later Restatements of the Law.12