Benoit Mandlebrot changed the way I think about everything, including Investing. His book "The (Mis)Behavior of Markets" was a clarion call to the investing community to view risk in more than just a single dimension - unfortunately it went unheeded. He is most famous for the theory of Fractal Geometry, which I won't attempt to explain but is a super important discovery. We will all miss Mandlebrot, but his ideas and influence will continue. It is my belief that his influence will continue to lead to incredible discoveries in math and science. RIP Benoit.