By Abbas Sarvestani

Mid-term elections in US under shadow of unprecedented political violence 

Attack against Nancy Pelosi's husband on October 28, once again turned the discussion of political violence into the headlines of the world's media. In general, political violence in most of the modern societies is the result of social tensions, which develop due to different reasons: Ideology, religious and ethnic conflicts, political conflicts between different groups of elites, economic conditions and the concept of relative deprivation.