What happened to feminism in the 21st century? This question feels increasingly urgent after a period of reactionary cultural and legislative backlash, when widespread uncertainty about the movement’s power, focus, and currency threatens decades of progress. Sophie Gilbert, a staff writer at 'The Atlantic' and finalist for the Pulitzer Prize in criticism, provides one answer, identifying an inflection point in the late 1990s and early 2000s when the energy of third-wave and “riot girrrl” feminism collapsed into a regressive period of hyper-objectification, sexualization, and infantilization. Gilbert mines the darker side of nostalgia, training her keen analytic eye on the most revealing cultural objects of the era, across music, film, television, fashion, tabloid journalism, and more. And what she recounts is harrowing, from the leering aesthetic of 'American Apparel' ads and explicit music videos to a burgeoning internet culture vicious towards women in the spotlight and damaging for those who weren’t. Gilbert tracks many of the period’s dominant themes back to the explosion of internet porn, tracing its widespread influence as it began to pervade our collective consciousness. She paints a devastating picture of an era when a distinctly American confluence of excess, materialism, and power-worship collided with the culture’s reactionary, puritanical, and chauvinistic currents. Amid a collective reconsideration of the way women are treated in public, 'Girl on Girl' is a blistering indictment of the matrix of misogyny that undergirded the cultural production of the early twenty-first century, and how it continues to shape our world today.