Comment by YZF

International law was and is also a fiction. We have various conventions and agreements.

https://en.wikipedia.org/wiki/International_law

"In the 1940s through the 1970s, the dissolution of the Soviet bloc and decolonisation across the world resulted in the establishment of scores of newly independent states.[67] As these former colonies became their own states, they adopted European views of international law.[68] A flurry of institutions, ranging from the International Monetary Fund (IMF) and the International Bank for Reconstruction and Development (World Bank) to the World Health Organization furthered the development of a multilateralist approach as states chose to compromise on sovereignty to benefit from international cooperation.[69] Since the 1980s, there has been an increasing focus on the phenomenon of globalisation and on protecting human rights on the global scale, particularly when minorities or indigenous communities are involved, as concerns are raised that globalisation may be increasing inequality in the international legal system.[70]"