The different way's they wanted to run their country.
One side wanted a dictatorship I think, one wanted a democracy.
They put up the wall too separate each other... that way the countries could be ran different way's... however all that did was bring more drama.
Answer:
ok but shadow and bone are some of the best books and the show is good too
Explanation:
The collapse of the Indus Valley Civilizations can be attributed to the following factors. One, the trade networks declined and disappeared. This meant less work for traders and manufacturers. Two, changes in geography that caused the rivers to either dry up or change direction Three, the people abandoned the major cities. Four, without trade and access to water, people succumbed to disease and starvation.
This was caused by the bubonic plague also known as the 'black death'.Disease from flies that were on rats cause the population to wipe out.
