Abstract:
In the Third World State approach, international law was deemed used as a tool of legitimacy to colonize. This hypothesis can not be generalized to prevail in Indonesia context. To avoid generalization, author determines BPUPK/PPKI Session in 1945 as an object of the research because it’s represent important moment for Indonesia. This research use interdisiplinary approach, which combine between legal and histrory studies. Base on study on BPUPK/PPKI Session in 1945, author show the result is controvert to the previous hypothesis. First, international law is a legal regime that supports Indonesia's independence. The role of international law in the BPUPK / PPKI session is used as a tool to legitimize
Indonesian independence.