This document discusses the history and evolution of power ballads from the 1970s to the 2000s. It explores how power ballads originated in pop music in the 1970s with artists like Barry Manilow. The genre grew in popularity with rock and heavy metal groups in the 1980s. Power ballads then incorporated R&B styles in the 1990s and teen pop styles in the 2000s. The document analyzes how power ballads provide emotional experiences that say something about listeners and have become part of movies, TV, and other media.