He unveiled the extent of NSA spying, and generated a massive number of headlines and discussion on whether what he did was right or not. For example the article by Jeffrey Toobin says that he could have followed the laws regarding whistle blowing or went to congress, and not just release everything in one big act of civil disobedience. I believe that what he did was the best way to bring attention to the issue: by being disobedient. If he had done things according to the government, only people who follow events in government closely would know what was going on, and the public would still be unaware. But by creating controversy he drew the public to the issue, instead of trying to quietly fix it with little help. While the government has not made any drastic changes, his whistleblowing has brought the fact of the NSA spying to public light and made people aware of just what goes on behind the scenes.
To wrap it up, I believe that peaceful civil disobedience is beneficial to society. My reasoning being that the peaceful disobedience generates headlines about the injustice the group is protesting, and leads to discussion about the issue that would have otherwise went unknown to the public. Even if the government does not change, the public still deserves to know. However if the disobedience becomes violent, then it has the opposite effect and the public sides against the