You will find a Collier essay on democracy and development along with numerous comments, including from Bill Easterly and Nancy Birdsall, all courtesy of Boston Review.
Easterly is not happy:
I have been troubled by Paul Collier’s research and policy advocacy for
some time. In this essay he goes even further in directions I argued
were dangerous in his previous work. Collier wants to de facto
recolonize the “bottom billion,” and he justifies his position with
research that is based on one logical fallacy, one mistaken assumption,
and a multitude of fatally flawed statistical exercises.
Nancy Birdsall suggests that donors support more investment in policing. She also notes:
The economy of sub-Saharan Africa–including Nigeria and South Africa–is smaller than the economy of New York City.
There is much more at the link.