Answer:
While it is most often used to mean equally impractical and idealistic, it also has the sense of romantic nobility. It's source is from the great Spanish novel "Don Quixote",whose title character is given to unrealistic schemes and great chivalry.
The history of the Great Wall of China began when fortifications built by various states during the Spring and Autumn (771–476 BC) and Warring States periods (475–221 BC) were connected by the first emperor of China, Qin Shi Huang, to protect his newly founded Qin dynasty (221–206 BC) against incursions by nomads from
Tax the people
could not ensure laws were carried out
could not controll trade between states
He believed that the war was a struggle to end slavery
