What challenges were created because of the renaissance?

religious reforms, interests in social issues, new forms of lit., artistic achievements, exploration and colonization

The Renaissance is a period in European history, covering the span between the 14th and 17th centuries. It is an extension of the Middle Ages, and is bridged by the Age of Enlightenment to modern history. It grew in fragments, with the very first traces found seemingly in Italy, coming to cover much of Europe, for some scholars marking the beginning of the modern age.

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because the vietnam war was fought in an especially brutal and untraditional way