Hany Farid, a computer scientist at Dartmouth College, has developed a software algorithm that he claims will allow platforms like Facebook and Twitter to identify content created by the Islamic State and similar extremist groups and their supporters—and automatically eliminate them from their sites. He has teamed up with the Counter Extremist Project (CEP), a non-profit think thank, to create a database of extremist content online that Farid’s technology can then identify and remove from social media platforms.