This is tangentially related to some of the "political" discussions that have taken place on these pages. Many have pointed the futility of trying to change other people's minds. It is an interesting topic in an of itself.
This is an interesting podcast from the CBC IDEAS program, a discussion with Ken Dryden and Steve Pinker primarily about head injuries in hockey, but veers more widely into how people make up their minds about things.
The podcast can be heard here:
http://www.cbc.ca/radio/ideas/from-seat-belts-to-hockey-masks-7-changes-that-once-seemed-unthinkable-1.4580419.
Or, you can download the mp3 from this page:
http://www.cbc.ca/radio/podcasts/documentaries/the-best-of-ideas/. You will need to scroll down to the download link, it is the 2nd or 3rd from the top at the moment, but new podcasts are placed at the top so this will eventually migrate down the page. A text search of either "Dryden" or "Pinker" will find it.
The works of Steve Pinker may also be useful to read for those here who believe that things are getting worse and that we cannot fix anything. A Google search will find his books. He also has a Ted talk, I believe, and there are probably several podcast interviews with him around the interweb, which should be relatively easy to find. Sorry, I don't have those links handy.