The repression of the rights of girls and women is continuously threatened in a wide range of global cultural contexts. From the rise in laws restricting reproductive freedom to the growth in essentialist ideas about gender and the backlash to the #MeToo movement, the challenges facing girls and young women are as diverse as the activism networks established to address them. Girls Take Action shines light on the myriad ways girls and young women are exercising agency in the face of injustice, considering especially the role of community and collaboration in fostering activism networks and ultimately a more transnational understanding of girlhood.