Despite the military drama unfolding in Libya, the Middle East is only beginning to unravel. American policy-makers have been spoiled by events in Tunisia and Egypt, both of which boast relatively sturdy institutions, civil society associations and middle classes, as well as being age-old clusters of civilization where states of one form or another have existed since antiquity. Darker terrain awaits us elsewhere in the region, where states will substantially weaken once the carapace of tyranny crumbles. The crucial tests lie ahead, beyond the distraction of Libya.

The...