By law, American corporations must maximize profits and shareholder value. But in the past decade new models of corporate responsibility, known as Benefit Corporations and B Corps, have gained a growing foothold in the nation's business community. Believing business can function as a force for good, the Philadelphia-based "B Lab" certifies qualifying companies as B Corps after subjecting them to a 200-point assessment of their workforce, community impact, transparency, and environmental impact. Among the certified 2,200 companies worldwide are ice cream makers Ben & Jerry's, eyeglass manufacturer Warby Parker, and outdoor clothing giant Patagonia. NewsHour Weekend's Christopher Booker reports.