Mentor Capital Network | 675 followers on LinkedIn. The MCN supports entrepreneurs who are launching or growing market solutions to address the world’s biggest problems. | The Mentor Capital Network (MCN), formerly known as The William James Foundation, matches the most interesting and viable sustainable business entrepreneurs with teams of world-class experts who provide detailed feedback and mentorship for their business ideas. MCN manages the Sustainable Business Plan Collaboration, which: * Provides sustainable entrepreneurs with detailed and constructive feedback, and a chance at more than $75,000 worth of in-kind prizes and cash.