Left to right: Doriane Pin, Don McGuire, Gabby George, Carmelo Anthony —Kym Illman—Getty Images; Paul Devlin—Sportsfile/Web Summit/Getty Images; Poppy Townson—MUFC/Manchester United/Getty Images; Dia Dipasupil—Tribeca Festival/Getty ImagesFour athletes, executives, and entrepreneurs convened at a TIME100 Talk in Cannes, France, on Monday to discuss how sports has become one of the world's most powerful engines of culture and connection—and why a…