Answer:
If their writing dissapears, then, what is known about that civilization is also likely to dissapear, unless their previous writing was preserved in some other way.
This is something that has actually happened often in history. For example, the library of Alexandria, in Egypt, was the largest library of the Ancient World, and it was burned down by Caliph Omar in 642 AD. Countless works by Ancient authors, that gave account of civilizations, cultures, philosphies, and religions, were lost, and there is no plausible way to recover such knowledge in the current era.
Hope dis helps :)
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The </span>Egyptians invented<span> and used many simple machines, such as the ramp and the lever, to aid construction processes. They used rope trusses to stiffen the beam of ships. </span>Egyptian<span> paper, </span>made<span> from papyrus, and pottery </span>were<span> mass-</span>produced<span> and exported throughout the Mediterranean basin.</span>
THE ANSWER IS REFUGEES!!!!!!!!!!!!!!!!!!!!!!!!!
The nations had different systems of government and different economic systems. The USSR hated the U.S and it's capitalism, hoping to one day crush it but with the fall of the USSR in 1991, It was a monumental victory for capitalism over communism and socialism.