Human nature and its implications for moral philosophy has been a recurrent topic of philosophical inquiry. Thinkers from Plato to Arendt, struggling with the testimony of human experience, have attempted to explain the relation between reason and wickedness. Some have stressed the intrinsic rationality and goodness of human beings, relegating evil to the influence of factors alien to reason. Others have viewed humans as intrinsically evil, their capacity for reason a weak and inconsequential force.