"People can sneer all they want at Ms. Thunberg, just as their predecessors sneered at earlier protest movements and called them a waste of time. But many of those campaigns did have an effect. Some stopped wars. Some brought about laws that outlawed racist policies. Some stopped whales from being butchered indiscriminately. No, Greta Thunberg is not going to save the planet on her own. But at least she is holding those in a position to do something about climate change to account, speaking hard truths many others are afraid to. She is not an attention seeker. She is a young person frightened to death about the state of the world she is inheriting. Sure, mumble that she is a disillusioned naif if you wish. I prefer to think of Ms. Thunberg as something else: a powerful and vital new voice in the climate debate. And someone who deserves support, encouragement and thanks from her fellow global citizens."