Principle of Freedom of the Seas

…In order to be persuasive to sovereigns, theories of international law were based on Roman law, theological theory, natural law, and the teachings of philosophers, in addition to customary practices, and the perspective of "law by agreement between nations" was immature. For example, in the field of war law, the theory of just war was advocated based on theological theory, and the "principle of freedom of the seas" was advocated due to the natural characteristics of the vast oceans. In addition, with regard to territorial acquisition, the theory of pre-occupation, which inherited the ideas of Roman law, was influential. …

*Some of the terms mentioned in relation to the "principle of freedom of the seas" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…また，国際法の理論も，君主たちにも説得力をもつように，慣行のほかに，ローマ法，神学の理論，自然の摂理，哲人の教えなどが基礎とされ，〈国家間の合意による法〉という視点は未成熟であった。たとえば，戦争法の分野では神学の理論に基づく正戦論が主張され，また，広大な海洋の自然的性質から〈海洋自由の原則〉が主張された。また，領土取得に関しては，ローマ法の考え方を継承する先占の理論が有力であった。…

※「海洋自由の原則」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報