An Open Letter to Greta Thunberg

Psychology can teach us how to harness panic and fear for meaningful action.

I write to you in your seventeenth year. I am writing you because this was the year you saw people ridicule you, a solitary figure calling the world to attention with School Strike for Climate; because you know that the last four years were the hottest on record; because you have seen the effects of climate change everywhere; and because you now know that you are not alone—you saw more than 4 million people in more than 161 countries follow your lead to strike for climate.