Agree or disagree with young Greta, she started a one girl school strike against the causes of climate change and that snowballed into worldwide strikes by kids and then too many protest marches by adults to count. She got to speak to more world leaders than all of us will in our combined lifetimes and has had some effect on the issue.

Not bad for a (then) 15 year old girl with autism. Whether you're with or agin her, you have to admire her having the cojones to get a purpose and follow through on it.