In the first of two shows about the fight between the richest man and the unions at his Homestead steel plant - we look at why Andrew Carnegie decided that his workforce deserved a smaller share of his profits and the lengths he went to to cut their wages.

Carnegie grew up in poverty and publicly proclaimed that rich moguls such as he had a duty to aid the poor - but that didn't stop him using every weapon at his disposal to crush the steel workers' union. The fight got violent - very violent - and its ripples are still being felt to this day.

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When America’s first president set off to tour his new country, he had no idea where to stay. George Washington slept in some taverns he described as dirty and grim, but also stayed at some delightful inns. In the 1790s, there was no way for travellers to share tips on the nice places to sleep and those to avoid.

Fast forward to today and the rise of peer-to-peer services where we book a car ride, rent a vacation home or bid in an online auction, and the same trust problem occurs. How do we know we can rely on a vendor we’ve never met? And how can we praise good customer service with a glowing recommendation? That's why the user review was created.

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This is a special crossover episode with Cautionary Tales with Tim Harford.

John DeLorean was a top car executive - but he was too maverick to fit into the oppressive corporate culture of GM. He wanted to make a new and exciting sports car - a futuristic stainless steel marvel with distinctive gull-wing doors (which found fame in Back to the Future). He just needed someone to give him millions of dollars to get started.

The British government agreed to foot the bill, but only if DeLorean built his factory in a troubled part of Northern Ireland. The cars coming off the production line were beset with problems and sales slowed down. Company finances were also strained by DeLorean's spendthrift ways and brazen theft. Finally, someone offered DeLorean a lifeline if only he'd come in on a cocaine deal.

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