How many Gretas does it take to bring down a notorious online misogynist and alleged human trafficker? Just two. While this week's turn of events in Romania has certainly been an amusing and satisfying end to the year on social media, what can we do about the growing acceptance of violence against women online? How can we end misogyny on social media?

When human trafficking makes the news, law enforcement and policymakers often take center stage as leaders and heroes in anti-trafficking. But, with far less fanfare, one unexpected group has been implementing successful programs to not only prevent trafficking but to rehabilitate survivors: nuns. Talitha Kum, which loosely translates from Aramaic to "young girl, arise," is a Sister-led coalition that has been operating since 2009 and is present in 92 countries. January is National Human Trafficking Prevention Month. Girl Friday asks: What can we learn from nuns around the world?