Power sits at the heart of every leadership role. It's the thing that lets you make decisions, direct activity and have an impact across a broader scale. It's also something we generally don't talk about openly and honestly. We talk about strategy, execution, and culture. We talk about governance and succession. But we rarely talk about the simple fact that the authority...

In July 1887, the historian and politician John Dalberg-Acton sat down to write a letter. It wasn't his best, but it did contain one very memorable line: "Power tends to corrupt, and absolute power corrupts absolutely". Today, nearly 150 years later, it's not only still quoted but widely accepted as...