One of the biggest areas of change in the last decade is related to associates that work in our stores, picking orders for delivery and pickup for our customers. And we have something north of 200,000 people doing that job, and yet we have about the same (total) number of people working in Walmart U.S.

As I look across our company, we have everything from store associates to supply chain associates. Of the 2.1 million people (globally), something less than 75,000 of them are home office jobs. All the other ones are working in a store, a club, a distribution center. And I think those jobs change more gradually. We are still going to want to serve customers and members with people. The change as it relates to the home office jobs probably happens faster.

The truth is we have a consistent purpose that we got from our founder, some values that we share - those are persistent, too. It's not just change. But that's the thing that people underestimate about Walmart right now, that it has an ability to change.

I'm one of those people that think Thomas Edison and the light bulb changed the world more than Karl Marx ever did.

People change. I wouldn't like to be accountable for the interviews I've done, or the person I was when I was 20, 21.

We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten. Don't let yourself be lulled into inaction.