Sometimes you have to be ruthless to be successful, but that doesn't extend to animals.
While famous faces in the entertainment industry are known for turning vegan, a surprising amount of business leaders and athletes also find benefits in ditching meat and dairy.
Public figures like Samuel L. Jackson and Al Gore turn to veganism for a wide variety of reasons, from saving the planet to wanting to live forever.
To honour World Vegan Day, we've listed some of the most powerful plant-eaters on the planet.
From Bill Clinton to Barry White, here are 17 powerful people who maintain a vegan diet, ranked by how long they've stuck to the lifestyle.
17. Stevie Wonder is arguably the most powerful solo artist in the world, having won more Grammy Awards than any other singer and secured a Lifetime Achievement Award in 1996. Wonder became a vegan in 2015, and even sung about it on James Corden's "The Late Late Show."
16. In 2015, Elizabeth Holmes, the founder of blood testing firm Theranos, was ranked as Forbes' richest self-made woman with a net worth of £3.68 billion, a figure which dropped to £653 million the following year after the firm was hit with allegations of test inaccuracy. In December 2014, the New Yorker described Holmes as a vegan who "several times a day drinks a pulverized concoction of cucumber, parsley, kale, spinach, romaine lettuce, and celery."
15. As the second-highest paid actor in the world after Harrison Ford, Samuel L. Jackson is one of the richest vegans in Hollywood. He adopted a plant-based diet in August 2013, saying that he wanted to "live forever."
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