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52 ideas that changed the world - 30. The production lineIn Depth Pioneered by Henry Ford, the assembly line heralded the birth of mass production
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52 ideas that changed the world: 29. Reality TVIn Depth From British bricklayers to the US president and the Kardashians, ‘real-life’ shows have created a new type of celebrity
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52 ideas that changed the world: 28. RetirementIn Depth Being able to stop work and enjoy old age has created a whole new class of citizens
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52 ideas that changed the world: 27. IndividualismIn Depth Championing the moral worth of the individual has had far-reaching effects
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