Sport is an important part of Papua New Guinean culture, and rugby league is by far the most popular sport. In a nation where communities are far apart and many people live at a minimal subsistence level, rugby league has been described as a replacement for tribal warfare as a way of explaining the local enthusiasm for the game. Many Papua New Guineans have become celebrities by representing their country or playing in an overseas professional league. Even Australian rugby league players who have played in the annual State of Origin series, which is celebrated every year in PNG, are among the most well-known people throughout the nation. State of Origin is a highlight of the year for most Papua New Guineans, although the support is so passionate that many people have died over the years in violent clashes supporting their team. The Papua New Guinea national rugby league team usually plays against the Australian Prime Minister's XIII (a selection of NRL players) each year, normally in Port Moresby.