Over the past 15 years, our thinking has shifted - the role of local agency and self-determination has become central to the policy discussion, though I would argue it has always been central to how humans make progress.
Social enterprises can become easily distracted building and managing their business instead of focusing on the problem they are trying to solve -- even if the solution involves running a healthy business.
The rescue of the bottom billion is only a reality if Mr. Sachs and Mr. Easterly put their outstanding intellectual skills to work instead of trying to win a debate that academics will perpetuate so long as they exist.
Leading lights of the aid movement -- Geldof, Bono, Sachs and Easterly -- continue to bicker with politicians and amongst themselves without taking a visible role in reform of the levers of assistance.
Calling 63 countries "potentially well governed" is like saying Paris Hilton is potentially a virgin; ignoring bad government is a formula for the same kind of bad aid policy that produced decades of failure.
Sub-Saharan Africa faces a constellation of special challenges, with greater or lesser impact in different parts of the region. These challenges should be addressed forthrightly and in an integrated manner.