Source
Foreign Affairs (USA)

In the decades to come, the most lethal threats to the United States’ safety and security — a city poisoned or reduced to rubble by a terrorist attack — are likely to emanate from states that cannot adequately govern themselves or secure their own territory. Dealing with such fractured or failing states is, in many ways, the main security challenge of our time.
For the Defense Department and the entire U.S. government, it is also a complex institutional challenge. The United States is (...)