Sir Richard Branson is a hugely successful international entrepreneur, adventurer and icon, and is founder of the Virgin Group.

His autobiography, Losing My Virginity, and his books on business, Screw It, Let's Do It, Business Stripped Bare, Screw Business as Usual and Like a Virgin are all international bestsellers.

He is also the author of Reach for the Skies. He lives on Necker Island in the British Virgin Islands and is married to Joan and has two grown-up children Holly and Sam.

Bill Gates is a technologist, business leader, and philanthropist. In 1975, he cofounded Microsoft with his childhood friend Paul Allen; today he and his wife, Melinda, are cochairs of the Bill & Melinda Gates Foundation.

He also launched Breakthrough Energy, an effort to commercialize clean energy and other climate-related technologies. He and Melinda have three children and live in Medina, Washington.