One unrepaired broken window is a signal that no one cares, and so breaking more windows costs nothing.

Window-breaking does not necessarily occur on a large scale because some areas are inhabited by determined window-breakers whereas others are populated by window-lovers; rather, one unrepaired broken window is a signal that no one cares, and so breaking more windows costs nothing.

Character is not the enemy of self-expression and personal freedom, it is their necessary precondition.

But no one has yet succeeded in reducing the size or scope of the federal government

Public order is a fragile thing, and if you don't fix the first broken window, soon all the windows will be broken.

Four innate sentiments dispose people to a universal moral sense. These are sympathy, fairness, self-control and duty.

What most needs explanation is not why some people are criminals, but why most people are not.