The main benefit of mastering all the world's countries and capitals that I have found is it will give you an instant rapport with new aquaintances.
I have found learning and knowing all the world's countries and capitals a rewarding and fun hobby especially when you detect a slight accent from a new aquaintance and you get to ask them what country they are from. The surprise they register when you tell them their country's capital is enough to bring joy to both of you. I have found that it causes an instant friendship bond.
It can be a daunting task to master all the world's country capitals, but World Guru will break it down into easy to manage portions. From there knowing your world capitals is like a muscle. You have to exercise it to allow it to grow and remain strong.
I found the countries ending in "stan" one of the more difficult groups to learn, but now you can experience just how easy learning the "stans" can be. Enjoy!
The African Continent with 53 countries was the toughest. If you master the countries ending in "stan" and the African Continent you will be well on your way to being a World Guru!
I supply the tools that make it easy. Try them and see what you think. All it takes is a little effort.