New Frontiers of Philanthropy: A Guide to the New Tools and New Actors That Are Reshaping Global Philanthropy and Social InvestingThe resources of both governments and traditional philanthropy are either barely growing or in decline, yet the problems of poverty, ill health, and environmental degradation balloon daily. It is therefore increasingly clear that we urgently need new models for financing and promoting social and environmental objectives. Fortunately, a significant revolution appears to be underway on the frontiers of philanthropy and social investing, tapping not only