We are so isolated in our own little worlds, in our own little geographies, that it's pretty hard to understand where someone else is coming from. And so I think that we have to really think about what that means as a country and, frankly, whether this segregation that we have is durable over the long run.

As a culture, working-class white Americans like myself had no heroes. We loved the military but had no George S. Patton figure in the modern army. I doubt my neighbours could even name a high-ranking military officer.

We need to think about how we teach working-class children about not just hard skills, like reading and mathematics, but also soft skills, like conflict resolution and financial management.

People in my hometown voted for President Reagan - for many, like my grandpa, he was their first Republican - because he promised that tax cuts would bring higher wages and new jobs. It seemed he was right, so we voted for the next Republican promising tax cuts and job creation, George W. Bush. He wasn't right.

Management's job is to convey leadership's message in a compelling and inspiring way. Not just in meetings, but also by example.

Clearly no one knows what leadership has gone undiscovered in women of all races, and in black and other minority men.

Sometimes, you do need different leaders for different stages of the company.

Germany's Angela Merkel exudes an atmosphere of elderly exhaustion and pooped-out pessimism. Britain's David Cameron, though by nature exuberant, feels he has to look and sound glum. And France's leader, Francois Hollande, seems determined to drive every successful businessman out of the country.