[anonimo]

I'm very skeptical of the validity of this study.

The graph shows no riots at all between 2008 and 2012. E.g. there are no data points in the graph for the riots related to the Jyllands-Posten Muhammad cartoons. They resulted in more than 100 deaths! [1]

In 2011, from the top of my head, there were riots in the UK, the Vancouver Stanley Cup riots in Canada [2], and anti-government riots in Thai.

In my country, Brazil, football hooliganism is rampant, there are at least a few riots a year.

In short, they must be using a very arbitrary definition of "riot", that just so happens to coincide with their theory.

[1] http://en.wikipedia.org/wiki/Jyllands-Posten_Muhammad_cartoo...

[2] http://en.wikipedia.org/wiki/2011_Vancouver_Stanley_Cup_riot