Quoting from Wikipedia.org
Social Innovation is comprised of new strategies, concepts, or ideas that transform policy and practices especially as they relate to the development or extension of civil society. Such actions may be new responses to unmet needs for products and services or better ways of meeting existing needs. It also concerns improved quality of life, and may relate to social welfare, working conditions, employment, or community development.
Read the entire entry in Wikipedia. It contains examples of Social Innovation in the 2000’s and other information.