The ICC claims to act accordingly towards crimes against humanity which deminish the human race by setting up ad hoc courts. In july 2002 104 member states joined. Russia, USA and China refused to have their “war crimes” investigated and trialled by saying that their local courts are able to maintain justice.Right now most of their cases are coming from Africa, which they believe makes them look unfair and unbalanced. They aim to become a universal power for justice against crimes such as genocide, sex slavery, brutal murder, within the time of war, but outside of the "context "of this war.
Even though countries like USA and Russia are able to hide away from this “centralization” as byzantine said, is due to their influence in world politics. Just like other branches of international law, they say they only step in, and meddle with affairs once the local courts have proven to not be able to deal with the issues by themselves. However this is very relative, as a country may say they are dealing with the problem well, for example China saying they have no war crimes to confess, or that war crimes are crimes committed in specific circunstances of extreme violence and terror, and the ICC stepping up and claiming this to be a sign of “not being able to handling the issue” if, China had ratified the treaty that is. In terms of other countries, it is harder to deny the act of joining these international “organizations” due to political pressure.
This court may be seen as juust another way to erode the customs of places like Africa. Its not just centralization of law per se, more specifically its centralization of “American” law so to speak as they’re defending the western conception of human rights. These end up destroying their sovereingty in an external manner. They may still have internal sovereignty over their citizens, but according to political science, sovereign states should have external and internal powers, which by signing up to these organizations causes them to lose the former.
in a broader sense, any liberty these citizens have, is maimed by the fact that their government, and entity which is supposed to represent them, agrees to certain terms in international treaties. Even though i personally strongly believe in human dignity and human rights, i think imposing laws on war crimes in this manner can be considered the act of tyranny.
Even though by signing an international agreement, the state gains the access to one more legal system and its laws, it loses Liberty, which kind of defeats the purpose of “pluralismo juridico” or the coexistence of more than one legal system in a society - which is to run away from legal postivism, and therefore a fixed and rigid set of laws.
Ps: i apologize for any language mistakes i may have made, as im Portuguese [:D]