The top tournament in rugby, as in most other sports, is the World Cup. In this case, of course, the Rugby World Cup.
A more selective and exclusive, yet still popular, tournament is the Six Nations Championship, but only England, Scotland, Ireland, Wales, France, and Italy are allowed to participate.
As a response to the Six Nations, there is the Americas Rugby Championship, where United States, Canada, Argentina, Brazil, Uruguay, and Chile compete.
