Okay, so you know how there's a game called soccer where you kick a ball and try to score in a goal? Well, rugby is a game kind of like that, but you carry the ball instead of kicking it.
A long long time ago, in the 1800s, some people who played rugby in England decided they wanted to change the rules. They wanted to make the game a bit easier, faster, and more exciting to watch. So they made a new version of rugby called rugby league.
In rugby league, the teams have fewer players, and they don't have to scrum as much (which means they don't have to push really hard against each other to try to get the ball). They also have more chances to score points, which makes the game more exciting.
People really liked this new version of rugby, and soon it became a popular sport not just in England, but also in other countries like Australia and New Zealand. People started having their own rugby league teams and competitions, and it became a big part of their culture.
Today, rugby league is still played in many parts of the world, and people love watching their favorite teams play. It's a really fun and exciting sport, and it all started because some people wanted to make rugby a bit easier and more exciting.