He conflates rates of growth with actual numbers. It is true that the rate of population growth worldwide has declined since 1970. However, the base population has grown by more than three billion; thus we currently add 80 million or more people to the planet each year. That is hardly defusing population growth!
Still, religious peacebuilding is a developing concept. Most of the literature regarding religion and peacebuilding is in the form of case studies, that is stories of specific events, groups, and individuals.
peacekeeper - a member of a military force that is assigned (often with international sanction) to preserve peace in a trouble area armed forces, armed services, military, military machine, war machine - the military forces of a nation; their military is the largest in the region; the military machine is the same one we faced in 1991 but now it is weaker