On May 23, at the end of the last massive school strike, Thunberg and 46 other youth activists released an open letter to The Guardian urging adults to join in next time. Because, as they pointed out, there are limits to what young people can do on their own. If you can't vote, and if you don't own stocks, then your ability to pull the main levers of power is limited. They wrote: "Sorry if this is inconvenient for you. But this is not a single-generation job. It's humanity's job.”.