It's very good to see that the Oxford Research Group's book "War Prevention Works: 50 Stories of People Resolving Conflict" is now available online as a PDF file, 6 years after it was first published. At 4MB it's not small, but well worth looking at if you've not come across it before. The blurb on the website says...
This book aims to raise awareness among government policy-makers, the media, potential funders and the general public of the extraordinary cost-effectiveness of those working non-violently at the front line of conflict. It is intended as an introduction to the field of conflict prevention and resolution, from the perspective of what has actually worked in the field, using concrete examples.