From New York Review of Books:

People on the left believe that systems are corrupt. People on the right tend to believe that the system (at least as they understand its design) is just fine, and it’s individual people who are too corrupt or too weak to propel it toward its full greatness. Thus partisans of the right lean more toward a version of Thomas Carlyle’s view that history is about great men (and now women, too), which elevates biography to the level of supreme importance, while partisans of the left care less about the outsider’s life story than his criticism of power and how he will challenge it. These differing conceptions dictate how the candidates present themselves and even how they would govern, should one of them become president.