This is a fine work of historical scholarship, but I have three problems with it. The first one is that it is too ideological, or, to put it another way, insufficiently dispassionate for a work of history. The second is that he is way too hard on the scholarly discipline of demography, the association of which with population control he overstates. Demography in the 20th-century achieved enormous triumphs in formal/mathematical theory, statistical methods, data collection, and (still incompletely developed) social science understanding of population processes. Connelly seems to suggest that any study or analysis at the population level denigrates individual liberty. I think that is an unreasonable assessment.
The third (and most important) problem is that it gets overly bogged down in the details of who said what to whom, bureaucratic squabbles, power struggles, etc. What gets lost in all these details are the grander historical contexts. For example, in the few decades after World War II, we entered the age of what I like to call "high modernism." The manifestations of this age ramified in music, art, architecture, and social/political theory. In the latter sphere we saw "modernization theory," "development economics," welfare state mixed economies, structuralism, and a general predilection toward management, planning, systems approaches, global governance, the sanctity of science, utopianism, and what would later be referred to as "metanarratives." Population control was one manifestation of this intellectual, political, and artistic movement, but the extent to which this context matters seems to escape Connelly's account. Is it a coincidence that the hey-day of population control was also the hey-day of Robert Moses and Le Corbusier?
The post-modernism of the 80s and 90s was characterized by skepticism about modernist metanarratives, and many of the grand theories of the previous decades began to be viewed as dangerously naive. The 1994 World Population Conference may have been a "Waterloo" of population control (a point that Connelly overstates), but the demise of population control had a far broader intellectual context that, again, Connelly does not sufficiently develop.
Is population control dead? Perhaps for now. But fatal misconceptions about human social life come and go. We may not see this one again, but our children and grandchildren very well might.