This book is about humanity’s triumphs. But it is not a message of complacency. It is written partly as a warning. It would be a terrible mistake to take this progress for granted. There are forces at work in the world that would destroy the pillars of this development – the individual freedoms, open economy and technological progress. Terrorists and dictators do what they can to undermine open societies, but there are also threats from within our societies. Nationalist and authoritarian politicians want to dismantle individual freedoms and start building walls between countries again. These
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