Have a look at these two posts on Triratna News, definitely related to Buddhist social action:

Three dharmacharinis' account of their participation in the annual United Nations Vesak conference:
https://thebuddhistcentre.com/news/triratna-women-speak-out-un-day-vesak-conference-2014

and the three papers they gave, variously related to women, caste, poverty and meat-eating:
https://thebuddhistcentre.com/news/three-papers-un-day-vesak-conference-2014