The ICC has jurisdiction to defy unwilling governments and is still a step towards global enforcement of rights, even if it does not completely solve the problem.  The ICC can have jurisdiction over criminals whose states refuse to prosecute them (provided certain conditions are met), meaning that they can issue warrants for those who come from or lead countries that will not comply with the ICC. Moreover, the ICC centralizes prosecution efforts under one court, making possible prosecution much more efficient and likely and increasing whatever original chance there was of prosecuting the leader.  Even if the ICC does have trouble fully enforcing its decisions, it is still a step towards the idea of "collective enforcement," which entails states agreeing upon and following international norms by incorporating them into domestic law and promoting their enforcement. Ratification of the Rome Statute represents a commitment by national governments to assist the ICC with prosecution efforts.1  1 Mayerfeld, Jamie. "Who Shall be Judge? The United States, the International Criminal Court, and the Global Enforcement of Human Rights." Human Rights Quarterly, Vol. 25 No. 1, February 2003, 93-129.