there are at least one reason to explain why qinshiwang want to build great wall.
that time,many people want to invade china,qibshiwang have to built the great wall to prevent their invasion.I think qinshiwang's decision accelerate his dynasty's destruction.
I have two reasons to support my opinion.
firstly,for building a great wall,he employed more than 100000 people,and it taked at least 10 years to complete it.people is very angry,because those employee don't receive any money.
secondly,for building the great wall,country spend a large of money,and lead to country financial problem.and once country have no money,he order many people must donate their all property,so a large amount of people were dead because they have no moeny to buy some foods.
B:I agree with you,but after all qinshiwang built the great wall.and in 1987,UN proclaimed the great wall is a world heritage.thanks to a great wall,we can get world people's respect.in china,there is a saying, "if you don't go to the great wall.you aren't' a true man.