Intelligence agencies from a remarkable institutional constant in most soci
eties. They are frequently 'reformed' but almost never dismantled, since th
eir capabilities, personnel, and knowledge are simultaneously too vital and
too threatening to successor regimes. Several case studies are reviewed wh
ich demonstrate the tenacity of personnel, bureaucratic structures, and ins
titutional culture. The problem of dismantling intelligence agencies will c
onfront both successor regimes to failed states and the West, and it left u
naddressed will almost certainly undermine efforts at democratization. The
problems are especially acute when considering totalitarian regimes such as
Iraq. Carefully planning, debate over ethical and legal questions, and cha
nges in institutional and public culture are all necessary.