The bubonic plaque changed the social structure of Europe by this:
Before, the nobles and aristocrats were the 'body' that ran almost everything political. However, after the bubonic plague, this was shifted towards the common people. So the common people basically got more rights.
hope this helps :D
Key philosophies<span> in the Declaration of Independence were based upon ideas first expressed by european philosophers</span>
A) agriculture because i saw cotton gin and knew it immediately