For no particular reason, I have undertaken an effort to catalog and categorize the reasons why Americans disagree with the war in Iraq or have increasingly turned against it.

What it reinforces for me is that people who are “anti-war” do not present a unified front, and should not all be lumped together — it shows how critics appear on both the Right and the Left.

A person can be against the war for only one of these reasons, or several; everyone theoretically has a threshold under category three — a point at which even the strongest supporters of the war would conclude that the cost of action is too high. And it also suggests that those who disagree on every point, or agree on every point, are being insincere.

The outline vividly explains why support for the war continues on a downward trend, despite any successes and victories the U.S. coalition and Iraqis have achieved.

Breaking it down also helps me pinpoint where people are coming from and puts me in a better position to offer constructive counter-arguments.

Can you add to this list (PDF)? At some point I may take the trouble to code this thing in HTML; until then, deal.