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The seed drill was a very efficient way to plant seeds as opposed to throwing the seeds all over the place.
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The flying shuttle doubled the work that a weaver could do in a day
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A steam engine was a very efficient way of transporting material.
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The communist manifesto was a document that described communism. By taking away the upper and lower class where everyone was one giant middle class.
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The civil war was a battle inside the U.S. between the North and the South over slavery.
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