Inspiring entrepreneurs: why you must plan to fail

The likelihood of failure and abandoning those you set out to help is one reality social entrepreneurs can't ignore. How then do you ensure you're a responsible social entrepreneur? Fergal Byrne finds out from Ian MacMillan, professor of Innovation and Entrepreneurship and director of the Sol C. Snider Entrepreneurial Research Center at the University of Pennsylvania, and author of The Social Entrepreneur's Playbook.