“No one is too small to make a difference,” says 16-year-old environmental activist Greta Thunberg.

Ever since the Swede took to the Swedish Parliament last year to call for stronger climate action against global warming, she’s inspired similar strikes across the globe.

On Friday, thousands of students skipped school and adults skipped work in cities around the world from New York to Paris, Nairobi, Seoul, Bangkok, Islamabad, and Johannesburg to protest inaction on climate change.

“We deserve a safe future,” said Greta Thunberg in her speech at the New York Climate Strike to an estimate 250,000 people.

A reluctant activist who proclaims Asperger Syndrome as her superpower, Thunberg serves as a reminder that all it takes the effort of one dedicated and persistent individual to change the world.

As Margaret Mead once wrote, “Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it’s the only thing that ever has.”