According to a study published by Harvard, in 2004, the U.S. National Academy of Sciences released an evaluation from its review of existing research. After reviewing 253 journal articles, 99 books, 43 government publications and its own original empirical research, it failed to identify any gun control that had reduced violent crime, suicide, or gun accidents.
Somehow, it goes unreported that “despite constant and substantially increasing gun ownership, the United States saw progressive and dramatic reductions in criminal violence.” “On the other hand, the same time period in the United Kingdom saw a constant and dramatic increase in violent crime to which England’s response was ever-more drastic gun control. Nevertheless, criminal violence rampantly increased so that by 2000 England surpassed the United States to become one of the developed world’s most violence-ridden nations.
http://www.americanthinker.com/blog/2015/10/the_study_published_by_harvard_that_gun_grabbers_fear.html