Today there is a growing infrastructure around corporate responsibility that pressures companies to become more accountable, responsible, transparent and sustainable. Seeds were planted by a group of individuals, called difference makers. These individuals took multiple small steps toward system change, found leverage points for change, and were guided by values-driven vision that led them to work toward a better world. The work of a few of the difference makers is highlighted to illustrate their pragmatic vision and social entrepreneurship. The paper focuses on one important aspect of the growing infrastructure, which can be called responsibility assurance.