There is a quiet revolution afoot. It may not be as loud as the technology revolution—but some experts predict it will be just as transformative. Its reverberations are being felt across executive boardrooms, foundation offices, statehouses, and start-ups. And it’s fundamentally shifting the way investments are made, policies are penned, funds are endowed, and careers are chosen. This movement, which has been dubbed the Impact Revolution, advances a vision of doing well while doing measurable good.