Information and disinformation campaigns are centuries old, but our social media era has given new and rapid thrust to the sharing of ideas, both for good and ill intent. Meg Steenburgh and Peter W. Singer discuss his book, LikeWar: The Weaponization of Social Media, which analyzes the poisonous effects of disinformation on politics, war, and social issues worldwide. They look at the role of governments, laws, and individuals; and our collective responsibility to support digital literacy and engage in positive digital citizenship.  Peter Warren Singer is strategist at New America, a Professor of Practice at Arizona State University, and founder and managing partner at Useful Fiction LLC. Thank you to our sponsor NBI.