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The Most Useful Invention
The most useful invention is the written language. For tens of thousands of years, human beings communicated on oral language, like other animals. Many cultural treasures went lost due to inadequate recording. Since the invention of written language, people can record history, thoughts, and most important of all, can communicate with it. Written documents can note the events much more accurate than hearsay stories, and will leave less discrepancies from the reality. From this time on, the border between countries, races, and ages is broken, and better and deeper understanding to each other becomes possible thanks to this great invention.
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