Answer:
Africa is the only country having lowest human development
The main reason for the wall's construction had always been defense. Since China's first dynasty, the empire faced a near-constant threat of attack from the nomadic tribes to the north. This included those famed Mongols as well as lesser-known groups like the Xiongnu and the Göktürks.
In other societies education can be harder to get because not all people can afford and have schools. And others still use like hitting hands with rulers for punishment instead of detention, suspension, etc.
