"Leap of Reason" is the product of decades of hard-won insights from philanthropist Mario Morino, McKinsey & Company, and other social-sector innovators. It offers practical advice for social-sector leaders who want and need better information in order to fulfill the mission that compelled them to dedicate their lives to serving others. The authors make a convincing case that the nation's growing fiscal crisis will force all of us in the social sector to be clearer about our aspirations, more intentional in defining our approaches, more rigorous in gauging our progress, more willing to admit mistakes, more capable of quickly adapting and improving—all with an unrelenting focus on improving lives.