I Am Why is a national, intergenerational organization catalyzing a power shift in which young women and gender expansive activists claim individual and collective power and use this power to advance their vision of justice. We use three strategies: 1) An authentic methodology, connecting young activists’ narratives to policy and practice; 2) Communications tools that clarify issues, reframe solutions and model shared power; and 3) Movement building through young activists’ direct engagement with systems we aim to change. I Am Why brings young women and gender expansive activists together with researchers and other partners to increase young activists’ individual and collective power. By celebrating their strengths and sharing their stories and visions for justice, young people lead the way to policies, practices and programs that work.