USIP
Here’s one that looks like it might be the big time!
e United States Institute of Peace is an independent, nonpartisan, national institution established and funded by Congress. Its goals are to help prevent and resolve violent conflicts, promote post-conflict stability and development, and increase peacebuilding capacity, tools, and intellectual capital worldwide. The Institute does this by empowering others with knowledge, skills, and resources, as well as by directly engaging in peacebuilding efforts around the globe.
I’m dropping it into the “organizations” links.