1. IntroductionInternational law can undergo substantial changes if the privileged legal subjects, the States, share a common will. Whenever the circumstances are such, the actors can convene a conference and, after a series of negotiations, could conclude an international agreement among themselves that will lead to a new framework of international law. From a procedural point of view, therefore, it is rather simple to “do” international law. If the substantive elements overlap significantly (i.e. common denominator of state interests), international law can be modified in line with the will of the parties. This essay discusses four such fields that have been significantly changed during the post-1940 period: human rights, environmental law, law of the sea, and space law. The first two are of particular importance as they have general effects in relation to other legal fields. All the legal transformations identified in this article, in my opinion, point in one direction: a less salient principle of sovereign equality and increasingly prominent transnational regimes. Today, a state's absolute authority over its territory and its population is subject to greater limitations than seventy years ago.2. Human RightsThe evolution of human rights is a notable process in post-World War II international law. Human rights underwent a very influential change after 1945 following the massive human rights violations that occurred during World War II. The next sixty years were marked by the development of sophisticated international human rights treaties. General human rights gradually rose to the international level and joined the club of slavery and workers' rights. The adoption of the United Nations Charter… halfway through the document… a set of rules centered on sovereignty. However, these implications should be handled carefully since the sovereign equality of states is still, and will remain so for the foreseeable future, the dominant feature of international relations. Works Cited1. Anton Mathew Morgan. In R.2. Aust. In R.3. Byers-Chesterman. In R.4. Cassette. In R.5. Crawford-Olleson. In R.6. Evans. In R.7. Fitzmaurice. In R.8. Presentation by Franca.9. Freestone-Salman. In R.10. http://www.nationsencyclopedia.com/United-Nations/Law-of-the-Sea.html11. http://www.un.org/Depts/los/convention_agreements/convention_historical_perspective.htm12. Openheim. In R.13. Rio Declaration14. Sands. In R.15. Scroll to 'The nine pillars of the common heritage of humanity'.16. Slides on 'History'17. Slides on "Climate Change"18. Tuerk. In R.19. Charter of the United Nations20. UNHCR. In the R.