what happens if the galaxy milky way was destroyed?

Question: what happens if the galaxy milky way was destroyed?
- Keywords:
  galaxy,
  life,
  milky way
Asked by thedestroyer12155 to Mario on 27 Jun 2013.
- Mario Ruiz answered on 27 Jun 2013:
  
  I guess that the gravity in our planet and in the entire Solar System would change, maybe not a lot, but quite dramatically. So the Earth might change the way it revolves around the Sun and the seasons will be different. But I’m not an expert in the Universe and The Solar System, sorry!

Question: what happens if the galaxy milky way was destroyed?