Greta Thunberg was a fifteen-year-old with Asperger’s who sat alone outside the Swedish parliament with a hand-painted sign reading “School Strike for Climate.” Within two years, she had addressed the United Nations, sailed across the Atlantic, and become the most recognized climate activist in the world — admired by millions and despised by fossil fuel executives, populist politicians, and commentators who could not accept that a teenager had seized the moral high ground on the defining crisis of the century.

This episode traces Thunberg from her childhood depression and selective mutism through the first school strike, the viral spread of Fridays for Future, the UN speech that divided the world, and the question of whether youth activism can outlast the backlash.

• Thunberg’s childhood diagnosis, the depression triggered by climate awareness, and the selective mutism she overcame
• The first solitary school strike outside the Swedish parliament in August 2018
• The Fridays for Future movement, the Atlantic crossing, and the “How dare you” UN speech
• The backlash from political leaders, the online harassment, and the debate over activist celebrity