What causes mass shootings like the one in Aurora, CO or in Columbine?

What causes mass shootings like the one in Aurora, CO or in Columbine? created 10 months ago on July 20, 2012 by rongorongo

Easy access to guns (no guns, no mass murders)

Decadent society

Dangerous culture (movies, music, tv, video games, ...)

Mental illness (psychopathy, schizophrenia, ...)

Mental disorder (PTSD, stress, anxiety, ...)

Bad upbringing

Social environment (friends, work, ...)

Detachment from reality

Most of the above

Media coverage of these tragedies

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