The Juliana Theory is an American rock band formed in 1997 in Greensburg, Pennsylvania. Known for their blend of emo and alternative rock, the band gained popularity in the early 2000s with their emotional lyrics and melodic sound. They released several albums, including "Understand" and "Emotion Is Dead," which received critical acclaim and helped define the emo genre. The band went on hiatus in 2006 but reunited in 2014 for a series of shows. Their music continues to influence many contemporary bands within the emo and indie rock scenes, showcasing their lasting impact on the genre.