There is no reason why both Piketty&#x27;s and ISIS&#x27; rationale can&#x27;t both be true.  ISIS&#x27;s eschatological religious propaganda wouldn&#x27;t have nearly the resonance and recruiting power it does if it weren&#x27;t for the current state of political and economic inequality in the middle east.<p>Also, while the Planned Parenthood shootings are tragic, they are not widespread and frequent enough to be attributed to an aggregate measure such as income inequality.<p>Edit: removed my comment about how we&#x27;d have to have Christian armies rising in the US to have a situation comparable to ISIS.  Apparently that rubbed some the wrong way.