"First, democracies “are thought to be especially vulnerable to coercive punishment.” Their threshold of intolerable pain is lower than that of dictatorships. Second, democracies are believed to be more restrained than authoritarian regimes in their use of force, especially against noncombatants. “Democracies are widely perceived as less likely to harm civilians, and no democratic regime has committed genocide in the twentieth century.” Third, “suicide attacks may also be harder to organize or publicize in authoritarian police states.”"