It is a commonly expressed idea that a key goal of intervention in and assistance to foreign nations is to establish (or re-establish) legitimate political authority. Historically, even so great a skeptic as John Stuart Mill allowed that intervention could be justified if it were “for the good of the people themselves” as measured by their willingness to support and defend the results.

At a basic level, historically wars and conflicts were easy to understand: a cause, an enemy, a war. Things seemed clear, consistent, and predictable. There was symmetry and each side had its counterpart.

Technology contains no inherent moral directive—it empowers people, whatever their intent, good or evil. This has always been true: when bronze implements supplanted those made of stone, the ancient world got scythes and awls, but also swords and battle-axes. The novelty of our present situation is that modern technology can provide small groups of people with much greater lethality than ever before.