The International Criminal Court (ICC) is an intergovernmental organization and international tribunal seated in The Hague, Netherlands. It is the worlds first permanent international criminal court, established in 2002, and investigates and, where warranted, tries individuals charged with the gravest crimes of concern to the international community: genocide, war crimes, crimes against humanity, and the crime of aggression. The ICC is intended to complement, rather than replace, national courts and can only act when national courts have been found unable or unwilling to try a case. The ICC is governed by an international treaty called the Rome Statute, which sets out the Courts jurisdiction, structures, and functions. The Court is participating in a global fight to end impunity, and through international criminal justice, the Court aims to hold those responsible accountable for their crimes and to help prevent these crimes from happening again. The ICC cannot reach these goals alone and seeks to complement national courts as a court of last resort. The ICC has 123 member countries, but dozens of governments are not ICC members. The ICC is unable to prosecute individuals for acts of aggression until the states that are party to the Rome Statute reach consensus on the definition of and punishment for aggression. The ICC is a court that is complementary to national jurisdictions and prosecutes those most responsible for the worst crimes when the State in question is unable or unwilling to do so.