In this extract from her latest book On Fire, the No Logo author looks at why capitalism and politics have got in the way of addressing the climate crisis • Interview with Naomi Klein: ‘We are seeing the beginnings of the era of climate barbarism’ On a Friday in mid-March, they streamed out of schools in little rivulets, burbling with excitement and defiance at an act of truancy. The little streams emptied on to grand avenues and boulevards, where they combined with other flows of chanting children and teens. Soon the rivulets were rushing rivers: 100,000 bodies in Milan, 40,000 in Paris, 150,000 in Montreal. Cardboard signs bobbed above the surf of humanity: THERE IS NO PLANET B! DON’T BURN OUR FUTURE. THE HOUSE IS ON FIRE! There was no student strike in Mozambique; on 15 March the whole country was bracing for the impact of Cyclone Idai , one of the worst storms in Africa’s history, which drove people to take refuge at the tops of trees as the waters rose and would eventually kill more than 1,000 people.