In another addition to the film industry's current obsession with music biopics (Judy, Rocketman, Bohemian Rhapsody, and Straight Outta Compton, plus Aretha to come later this year), it's time to take a trip back to the 1970s and the song that became the unofficial anthem of the women's liberation movement. For the baby boomer generation, Helen Reddy was a feminist icon and the song forever synonymous with her name stood as the battle cry for females all over the globe. With women's rights staggeringly still under attack five decades...