NCERT Solutions for Class 9th Social Science Chapter 4 Fig. 4.38, The Great Wall of China — THINK ABOUT IT

Book page 92 Updated on2026-09-08

Q1.
What could have been the other reasons for building the Great Wall of China? Explore and share your findings on the Great Wall through a model or presentation.
Answer

The reason the chapter gives is defence: 'several walls were built from 680 BCE onwards by the Zhou and other dynasties as protection against the violent raids of nomadic tribes. These were later joined together to make an effective defence mechanism.' The question asks for the other reasons — so what follows is inference from what the chapter tells us about Chinese society, and it is labelled as such.

Possible reasonThe argument for itSupport in the chapter
Controlling tradeA wall with gates does not only keep people out — it decides where they may cross. Goods can then be inspected, counted and taxed at the gateSilk became a major export around the 2nd century BCE under the Han, so much so that the route took its name; a money economy existed by the 5th century BCE
Marking the boundary of the empireA visible line on the ground states where the empire's authority begins — useful to a state that has just unified the countryThe Qin dynasty (221–206 BCE) is 'credited for unifying the country'
Communication and troop movementA continuous wall is also a road along the frontier, and a line along which a warning can travel faster than a raiding partyPublic officials were examined in archery and horsemanship — a state that trained officials for mounted warfare needed to move them
Displaying the power of the rulerA work of this size announces what the state can command in labour and organisation, to its own people as much as to outsidersZhou rulers were 'both kings and priests, believed to be appointees of heaven'; Egypt's pyramids make the same kind of statement
Protecting farmland and settled lifeThe wall separates settled farming country from grazing country; it defends fields and stores, not just peopleUrban centres emerged 'with the expansion of agricultural productivity'; society by 1500 BCE rested on 'farmers and labourers'
Employing and organising labourA continuous project across centuries gives the state a standing use for conscripted labour and a reason to maintain supply linesBuilding continued over 'a period stretching to two thousand years', with repairs 'till the 17th century CE'
The point that makes the Wall interesting historically. It is not one wall and it was not one decision. The chapter is precise: separate walls from 680 BCE by different dynasties, later joined together, then expanded and repaired until the 17th century CE — roughly 2,300 years of work. So the reasons need not be the same at every stage. A Zhou wall against raiders and a later imperial wall guarding a trade route can both be true, of different centuries. Beware of the common mistake of treating the Wall as a single object with a single purpose.
For the model or presentation. Build a short section in cardboard or clay and include the three features that make it work as a system, not just a barrier: (i) a walkway on top wide enough to move soldiers; (ii) watchtowers at intervals, for seeing far and passing signals; (iii) a gate, and a label explaining that the gate is where trade is controlled and taxed. Add a timeline strip beneath: 680 BCE — first walls; Qin 221–206 BCE — unification; Han 206 BCE–220 CE — Silk Route trade; 17th century CE — last repairs. The timeline is what turns a model into an argument.
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