The following list of US mass shootings comes from a post entitled The massacre of the children of America by Michael Hoffman. I have to add that I don't agree with this editorial post, in which Hoffman condemns things such as usury, abortion and homosexual marriage and which one must presume are believed by Hoffman to be part of the cause of this massacre. That said, it's a concise list of the "major" mass shootings in America since 1966; there is a stark power in seeing it laid out so dry: date, place, number of casualties. The tempo definitely seems to be increasing....
I'd like to see some data on mass-shootings prior to 1966.
Timeline of U.S. Massacres
Compiled by Michael Hoffman
Compiler's note: All of the deaths listed are homicides, except in the case of a casualty statistic compiled by the media that groups a perpetrator who allegedly committed suicide, with the victims. Almost all of the deaths are by gunfire. I do not claim that this list is exhaustive. In almost all cases I have only listed as a "massacre" multiple deaths that occurred within a 24 hour period.
1966: Fifteen people are shot to death on the campus of the University of Texas at Austin.
1966: In Chicago, Illinois, nine nurses are massacred.
1982: Eight workers are shot by a co-worker at a Florida machine shop.
1984: Twenty-one patrons of a McDonald's restaurant are killed in California.
1986: Fourteen postal employees are killed by a co-worker in Oklahoma.
1990: Nine people are killed at a GMAC loan office in Florida by a co-worker.
1991: In Michigan five people are killed.
1991: 23 people are killed in Luby's Cafeteria in Texas.
1993: 8 people killed in the San Francisco, California financial district.
1993: Six people killed on a Long Island, New York commuter train.
1997: Three students killed by a fellow student at a high school in Kentucky
1998: Five people killed (four girls and a teacher) at an Arkansas Middle School (the killers were two children, age 13 and 10).
1999: Coumbine High School, Colorado: 13 people killed by two students.
1999: Nine people killed in the financial district in Atlanta, Georgia
1999: Seven people killed at a church in Texas.
2000: Seven people killed Dec. 26 at an Internet company in Massachusetts.
2001: 2 students killed and 13 wounded by fellow student in California
2003: Five killed at a Mississippi aircraft plant by a co-worker.
2005: Five students and two others killed by another student in Minnesota.
2006: Five Amish children killed at their Pennsylvania school by a truck driver.
2007: Five killed at a shopping mall in Utah. An off-duty policeman exchanges gunfire with the perpetrator, preventing more killings.
2007: 32 students killed at Virginia Tech by a fellow student.
2007: Dec. 5 - eight people killed at a Nebraska shopping mall.
2008: Five people killed at Northern Illinois University.
2009: Ten people killed in Alabama.
2009: Thirteen people killed in a Binghamton, New York immigration center.
2010: In Manchester, Connecticut a co-worker kills eight people.
2011: Six people killed in Tucson, Arizona; among the eleven who are wounded, U.S. Rep. Gabrielle Giffords is shot in the head but survives.
2011: Eight people killed at a beauty salon in California.
2012: A former student kills seven students at Oikos University in California.
2012: 12 people killed at a "Batman" movie in Aurora, Colorado.
2012: Six people killed at a Sikh Temple in Wisconsin.
2012: Five people killed in Minnesota by a co-worker.
2012: Three people killed at a beauty salon in Wisconsin.
2012: Dec. 11 - two people killed at an Oregon shopping mall.
2012: Dec. 14 - 27 people killed at a Connecticut grammar school, including twenty children.