Naomi Klein from Canada oversees courses for tens of thousands of Australian high school students. She’s an anarcho-environmentalist mobilising grass-roots mobs like Occupy to overturn capitalism. She never finished her bachelor’s degree but made a hit with her 2014 book This Changes Everything: Capitalism vs the Climate. As a New York Times reviewer hyper-ventilated: ‘[It’s] a book of such ambition and consequence that it is almost unreviewable.’