Mr Litman backs up his concern by saying that, according to Klout, the most influential person in the world is Justin Bieber.

BBC: Business

Under this peculiar arrangement, the chief agent to be monitored also serves as the most influential person in the body designed to monitor that agent.

FORBES: Corporate Governance At Berkshire Hathaway: Maybe It's Not All That

Perhaps the most influential and experienced person in the country, the Queen of School Lunch Ann Cooper and her team have now created The Lunch Box, a website dedicated to not only convincing us all that school lunch is important, but also providing critical hands-on tools a typical school kitchen needs to create great food.

FORBES: How to Cook for the Masses: 'The Lunch Box' Provides All the Tools

One gaming website voted him the joint 18th-most-influential person in computer games, quite an honour for someone who hardly played them.

ECONOMIST: Gary Gygax

Who is the most influential, yet least known, person in the GOP?

FORBES: Which Potential GOP Nominee Would Be Best-Positioned to Expand the Existing Republican Electoral Coalition?