Jeff Bezos has been the CEO of Amazon since the very beginning.

Since founding Amazon, Bezos has donated $42 million and part of his land in Texas to the construction of The Clock Of The Long Now, an underground clock designed to work for 10,000 years. In 2012, he donated $2.5 million to defend gay marriage in Washington. In August 2013, Bezos bought The Washington Post for $250 million. He funds a private space company called Blue Origin, which is working on developing technology for private space travel.

Bezos is now one of the most powerful figures in tech, with a net worth of roughly $82 billion.

Learn much more about his life here.