Superpowers

First of all their economical growth needs to be good. If the economical growth is good then the country is earning money and if the country is making good money then the government is making good money and if the government is making good money then basically the citizens are making good money and paying taxes. If the people have good money then that means they have good jobs, which means they had good education. Hence, the country has a good education system. They also have a lot of manpower and their industrial and tertiary sector is big. Those countries also have good foreign relationships so as to avoid warfare.