One of the world's wealthiest couples announced Friday they are donating $100 million to support public education and new businesses in some of Connecticut's most disadvantaged communities. The contribution from hedge fund billionaire Ray Dalio and his wife, Barbara, is believed to be the largest known philanthropic donation to the state, according to Gov. Ned Lamont's office. The Dalios live in Greenwich and Ray Dalio is the founder of the investment firm Bridgewater Associates. Forbes lists his net worth at more than $18 billion.