While there isn't a widely recognized global organization by that exact name, "Missy Private Society" most likely refers to the Missy Reading Society, a curated community launched by the Irish digital platform Missy.ie. The Missy Reading Society
Abortion in America: How Legislative Overreach Is Turning Reproductive Rights Into Criminal Wrongs : This is a major 2021 report co-authored by Missy Owen missy private society
Membership and Eligibility
Entry into Missy’s Private Society is non-linear and highly subjective. There is no application form; membership is by invitation only. While there isn't a widely recognized global organization