The primary governing body of international rugby is World Rugby, which was formerly known as the International Rugby Board (IRB). World Rugby is responsible for overseeing the rules and regulations of the sport globally, organizing international competitions, and promoting rugby development worldwide. It ensures fair play and consistent standards across different nations, facilitating the growth of rugby union as an international sport. Through initiatives and partnerships, World Rugby seeks to expand the game's reach, support emerging nations, and enhance the sport's global appeal.