Some rules are for everyone. 
Some rules are for the whole world. 
Long ago, a man named Grotius wrote about this. He said some things are always wrong. This helps all lands work together.
Later, there were trials for bad leaders. 
Some people think this is good. They want to stop bad people. Others worry about how it works.
It is a big way to keep peace. It tries to make the world fair.
Universal jurisdiction is a special set of legal rules. These rules let a country judge a person for a crime. This happens even if the crime did not occur in that country. It also happens if the person is not from that country. 
Some crimes are so bad they hurt the whole world. These include genocide and war crimes. People think no place should be a safe home for these criminals. Long ago, a thinker named Grotius wrote about universal right and wrong. 
One famous use was the Nuremberg trials. These trials judged Nazi leaders for their crimes. Some people thought these trials were fair. Others thought they were just winners seeking revenge. 
Today, there are groups like the International Criminal Court. This court helps judge very serious crimes. Some leaders worry about these rules. They fear judges might use them to be unfair to other nations. But many still believe these rules help keep the world safe.
Universal jurisdiction is a very special legal idea. It allows a country or a group of countries to judge a person for a crime. This happens even if the crime did not occur in that country. It also happens if the person is not a citizen of that country. 
There are two main ways this rule works in the world. One way is called the "global enforcer" approach. This is when a country actively tries to stop and punish crimes anywhere. The other way is called "no safe haven." This is a more passive way of making sure a country does not become a hiding place for criminals.
This idea has a very long history. Long ago, Roman laws spoke about rules that were common to all people. In the 1600s, a Dutch thinker named Grotius wrote about this too. He believed there were universal principles of right and wrong. 
One of the most famous moments was the Nuremberg trials after World War II. 

Today, we have special groups to help with this work. The International Criminal Court was set up in 2002. It sits in a place called The Hague. 
Universal jurisdiction is a powerful legal principle used by states and international organizations. It allows them to claim criminal jurisdiction over an accused person. This happens regardless of where the alleged crime occurred. It also applies regardless of the accused person's nationality or residence. This principle is used for crimes considered too serious to tolerate jurisdictional arbitrage. Such arbitrage occurs when criminals use legal gaps to avoid punishment. These crimes are seen as being against all of humanity. They are often linked to the idea of erga omnes obligations. These are duties owed to the entire world community. They are also connected to jus cogens. This term refers to international law obligations that are binding on all states.
There are two distinct ways this principle is applied in practice. The first is called the "global enforcer" approach. This is an active way of preventing and punishing international crimes anywhere. The second approach is known as "no safe haven." This is a more passive method of application. It focuses on ensuring a specific country does not become a territorial refuge for suspects. This is different from extraterritorial jurisdiction. Extraterritorial jurisdiction is when a state enforces its own specific laws abroad. For example, the United States asserts jurisdiction over stateless vessels carrying drugs in international waters. This is an act of enforcing domestic law rather than universal standards of right and wrong.

The history of this idea reaches back to ancient legal thoughts. The Institutes of Justinian discussed laws common to all mankind. These were laws that natural reason appoints for everyone. In the seventeenth century, the Dutch jurist Hugo Grotius laid the foundations for modern use. He wrote about universal principles of right and wrong in his works. These included De Jure Praedae and De Jure Belli ac Pacis. 

A major turning point occurred during the mid-20th century Nuremberg Trials. These trials followed the end of World War II. U.S. Justice Robert H. Jackson served as the chief prosecutor. He argued that an International Military Tribunal could enforce universal principles. This tribunal could prosecute acts without a specific geographic location. He focused on Nazi "crimes against the peace of the world." Even if these acts were legal under Nazi law, they were wrong. The trials sought an international rule of law unbound by national borders. However, some critics called this "victor's justice." Justice Harlan Fiske Stone even called the proceedings a "sanctimonious fraud."

Other notable examples show how these rules work in specific cases. In 1961, Israel tried Adolf Eichmann in Jerusalem. Kenneth Roth of Human Rights Watch notes this was a major use of universal jurisdiction. Furthermore, international treaties have helped spread these ideas. The Geneva Conventions of 1949 and the 1984 United Nations Convention Against Torture are key examples. These treaties require signatory states to pass laws based on universal jurisdiction. Another example involves the arrest of Augusto Pinochet in London in 1998. A Spanish judge demanded his arrest for human rights abuses. However, that specific case was based on the victims being Spanish citizens.
Today, several international tribunals use these legal frameworks. The International Criminal Court, or ICC, was established in 2002. It is located in The Hague. The ICC is defined by the Rome Statute. It can prosecute citizens of member states for genocide and war crimes. Article 7 of the Rome Statute defines serious crimes. These include murder, rape, slavery, and torture. While the ICC does not have universal jurisdiction over all crimes, the UN Security Council can refer cases to it. This has happened in Darfur in 2005 and Libya in 2011. Other specific courts include the International Criminal Tribunal for Rwanda and the International Criminal Tribunal for the former Yugoslavia.
Despite its goals, the concept remains a subject of intense debate. Some leaders, such as former U.S. diplomat Henry Kissinger, argue against it. He claims universal jurisdiction can breach a state's sovereignty. All states are equal in sovereignty under the United Nations Charter. Kissinger also warned that it could lead to "universal tyranny" by judges. He feared that many different states could create politically driven "show trials." These trials might attempt to label a state's enemies as criminals. Nevertheless, the United Nations continues to work toward protecting civilians. Resolution 1674 reaffirms the responsibility to protect people from ethnic cleansing and genocide.
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