Shopping used to be adversarial. Shoppers and store owners would bargain and haggle over prices. What one person got for $1, the next guy bought for £1.25. And there were no returns. It was unfair and stressful - and made shoppers distrustful that they were getting a good deal. John Wanamaker changed all that.

Wanamaker thought about being a preacher before setting up as a clothes merchant. So he built a retail empire built on fairness and trust. Price tags appeared in his stores - promising everyone would pay the same. And if you weren't happy - you could return your purchase. This was so unusual that Wanamaker even won the praise of a US President.

AND to see Joseph Monroe Bennett's magnificent moustache for yourself go to: https://archives.upenn.edu/exhibits/penn-people/biography/joseph-monroe-bennett/

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Why have so many tiny start-ups come from nowhere to take down huge established corporations? Is it because the incumbents were dumb? Harvard Business School professor Clayton M Christensen decided to explore these David versus Goliath battles - and came up with a theory to explain why seemingly solid businesses suddenly lose market share... disruptive innovation.

In his hit book, The Innovator's Dilemma, Christensen explored how flawed products from small companies can suddenly catch on, disrupt the market and steal customers from established corporations. Christensen - a life-long Boy Scout - was an odd champion for "disruptive innovation", but his ideas have totally changed the business landscape.

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At a time when women couldn't vote or freely enter the workplace, Ida Tarbell took on the richest man in America and triumphed. Ida grew up in the Pennsylvania oil fields of the 1870s, and saw how John D Rockefeller and his company Standard Oil bought or bullied independent firms. Ida's neighbors and even her own father were in Rockefeller's sights.

In adulthood, Ida joined a new movement in journalism. She was a "muckraker" - looking to dig up dirt on the greedy and unscrupulous monopolies of the Gilded Age. She wrote a 19-part investigation of Standard Oil that became a nationwide hit and forced the US government to act and break Rockefeller's empire apart.

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