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If you need to locate an expert on a topic, you may want to consider three places to find them: Organizations, Associations, and the links in the Experts box to the right. The Associations links are on the Career tab.
Google's Advanced Search capacity can help you identify organizations that advocate a position on a societal problem. These organizations are also called 'voluntary responses.' Many, though not all, have a ".org" domain as part of their website address.
In Google, try using the site:.org limit function and combine it with your societal problem:
Remember, whatever you find on the web -- evaluate it for credibility, authoritativeness, and viewpoint.