The citizen sector is rising worldwide. Social initiatives and enterprises have provided much needed products and services to improve poor people's quality of life. In many countries, the citizen sector has grown faster than the public sector and the business world, and has created millions of new jobs. To meet the challenges of upscaling and replicating successful operations, social pioneers have begun to adopt business models and management strategies from the market economy - they have become "social entrepreneurs." The development of their social enterprises is often severely compromised by the lack of adequate financial resources. The search for innovative funding mechanisms for social change has become a top priority of both philanthropic organizations and social entrepreneurs. This book explores the potential of structured social investment products and asset management strategies to give venture philanthropy a broader range of options in providing equity to social enterprises. It inquires into their preconditions, relevance, and outreach to society at large, and asks how innovative approaches can be scaled to improve their impact.