[in 1998] I know my political ideas affect what I write but I've tried to follow the facts wherever they land. Every topic I've written about begins as a question. How do police departments behave? Why do bureaucracies function the way they do? What moral intuitions do people have? How do courts make their decisions? What do blacks want from the political system? I can honestly say I didn't know the answers to those questions when I began looking into them.

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

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

Arresting a single drunk or a single vagrant who has harmed no identifiable person seems unjust, and in a sense it is. But failing to do anything about a score of drunks or a hundred vagrants may destroy an entire community.

The great achievement of Western culture since the Enlightenment is to make many of us peer over the wall and grant some respect to people outside it; the great failure of Western Culture is to deny that walls are inevitable or important.

A particular rule that seems to make sense in the individual case makes no sense when it is made a universal rule and applied to all cases. It makes no sense because it fails to take into account the connection between one broken window left untended and a thousand broken windows.

Police ought to protect communities as well as individuals.... Just as physicians now recognize the importance of fostering health rather than simply treating illness, so the police - and the rest of us - ought to recognize the importance of maintaining, intact, communities without broken windows.