Social innovation refers to innovative activities and services that are motivated by the goal of meeting a social need and that are predominantly diffused through organizations whose primary purposes are social. Business innovation is generally motivated by profit maximization and diffused through organizations that are primarily motivated by profit maximization. There are of course very many borderline cases, for example models of distance learning that were pioneered in social organizations but then adopted by businesses, or for-profit businesses innovating new approaches to helping disabled people into work. But these definitions provide a reasonable starting point.