There is a compound assertion that (a) guns are uniquely available in the United States compared with other modern developed nations, which is why (b) the United States has by far the highest murder rate. Though these assertions have been endlessly repeated, statement (b) is, in fact, false and statement (a) is substantially so.
Don B. Kates and Dr. Gary Mauser
Would Banning Firearms Reduce Murder and Suicide? A Review of International and Some Domestic Evidence
Harvard Journal of Law & Public Policy, Volume 30, Number 2, Spring 2007.
[See also the more recent commetary on it: Harvard University Study Reveals Astonishing Link Between Firearms, Crime and Gun Control (via email from Steve at work.
The paper is over eight years old but it is still relevant.—Joe]