The sites here will give you some good ideas on this topic.
http://www.google.com/#hl=en&source=hp&q=societal+changes+in+Europe+that+led+to+the+exploration+of+other+lands&btnG=Google+Search&aq=f&aqi=&aql=&oq=&gs_rfai=&gs_upl=&fp=e670ad9bc45cdf98
address the following points: The societal changes in Europe that led to the exploration of other lands The advances in Europe that made exploration possible
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