Front Porch Forum co-founders Michael and Valerie Wood-Lewis run the company from their home office in Burlington, Vt. Angela Evancie/Vermont Public Radio hide caption

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Arianna Huffington, president and editor-in-chief of The Huffington Post Media Group, speaks at the 2014 World Economic Forum. Reporters and editors in 15 countries will contribute to "What Works," her site's new initiative focused on covering positive news. Ruben Sprich/Reuters/Landov hide caption

itoggle caption Ruben Sprich/Reuters/Landov

Zarine Khan (right) and Shafi Khan, parents of Mohammed Hamzah Khan, speak to reporters in Chicago Oct. 9 after a federal hearing for their 19-year-old son, accused of trying to join Islamic State militants in Syria. Charles Rex Arbogast/AP hide caption

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Social media provides voice to movements and helps drive them. Picking the right platforms for these sensitive conversations, though, is a sign of our growing digital sophistication. iStockphoto hide caption

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This Nov. 19 screenshot shows the cover photo of an unofficial Marine group on Facebook called Just the Tip, of the Spear. The group and those like it have been accused of promoting sexism and of acting as a forum for hate speech. Just the Tip, of the Spear - 21/Facebook hide caption

itoggle caption Just the Tip, of the Spear - 21/Facebook

Photos from Liz Paul's blog entries on Prior Fat Girl. The blog chronicles women's weight loss journeys. Courtesy of Liz Paul/PriorFatGirl.com hide caption

itoggle caption Courtesy of Liz Paul/PriorFatGirl.com

Dana Bolger, who says she was raped in 2011 while a student at Amherst College, co-founded a group that seeks to educate students about their rights under Title IX. Jennifer Ludden/NPR hide caption

itoggle caption Jennifer Ludden/NPR

An Aymara woman prepares to take part in a pageant in La Paz, Bolivia, in 2013. Jaqi-Aru, a community of volunteers is working on translating the Facebook interface in the indigenous language of Aymara. Juan Karita/AP hide caption

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Our readers wrote in on how they tried to take a vacation from their smartphones. Christian Wheatley/iStockphoto hide caption

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