A pivotal figure in the history of Ancient Greek and Western philosophy.

A key figure in the American Renaissance movement. A proponent of New Thought.

An English business magnate, investor, author, and philanthropist.

Evolutionary biologist and science writer. One of the most admired living scientists.

A public speaker and leadership and personal growth coach.

An Indian yogi and author, teaching yoga in southern India since the 1980s.

A renowned business expert, best-selling author, lecturer, and high-profile blogger.

An Austrian neurologist, author, and the founder of psychoanalysis.

An American educator, author, businessman, and keynote speaker.

An American business magnate, industrial designer, investor, and media proprietor.

An Indian-American business executive. He is the chief executive officer of Google.

An American investor, business tycoon, philanthropist, and author.