The International Criminal Court is a good start. It is not viable in its current form and MUST be changed at some point, but it is a good start.
Unfortunately, though I support US entry into it, my view on Constitutional law would say that it is unconstitutional for the United States to accept the jurisdiction of anything, government, court, or legislature, as having full jurisdiction over the United States, and for the United States to join the ICC would require a Constitutional Amendment, as would the United States participating in a world government or strengthened United Nations. It is unconstitutional for Congress to give up the sovereignty of the United States without the consent of the states in the form of a Constitutional amendment, requring 3/4 of the states to approve. Granted, this would not be impossible, but how the hell are we to get thirty-eight out of fifty states to agree to such a thing? Unlikely, in my opinion.
Also, the Patriot Act is unconstitutional, as the Supreme Court has established, as of 1812, that the Bill of Rights applies to foreigners in the territories or under the authority of the United States, and spying on Americans without a warrant, well, I just have this to say:
Amendment IV: The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
The Supreme Court has confirmed that this applies to wiretapping and spying.
But, I digress.