Bill and Melinda Gates are the world's wealthiest couple according to a report out today from Wealth-X.
Bill Gates famously dropped out of Harvard and co-founded Microsoft (MSFT) in 1975 with Paul Allen.
Bill and Melinda are known for their high-profile Bill and Melinda Gates Foundation, which supports initiatives in education, world health and population and has donated more than $28 billion to philanthropic causes.
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They also helped launch The Giving Pledge with Warren Buffett, which encourages the world's richest individuals to dedicate the majority of their wealth to philanthropy.
