Petrén, S. Keywords: Expropriation | Claims | Mots clefs: Expropriation et nationalisation | ABSTRACT S. Petren writes that the question of the protection of foreign property against confiscation measures is the most topical issue in 1963. Evolution is then dominated by two major opposing trends, the first one drives the States, especially the new ones, to nationalize foreign property for social policy reasons, while the second trend is determined by the desire to create and maintain a political and economic …