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When the printing press was created, making posters and newspapers was a lot faster which caused growth of written propaganda rather than spoken propaganda.
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With the radio invented, it caused propaganda to be spread instantly.
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The invention of the internet led to the open viewing and accessability to all kinds of propaganda.
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<a href='http://www.merriam-webster.com/dictionary/propaganda' > the spreading of ideas, information, or rumor for the purpose of helping or injuring an institution, a cause, or a person
