We’ve clearly had a failure of leadership in this country. The political system is not working as it should. Big problems are not being addressed. But what’s the nature of that failure? The leading theory is that it’s the corruption. Another theory has to do with insularity. There’s merit in both theories. But I’d point to something deeper: Over the past few decades, thousands of good people have gone into public service, but they have found themselves enmeshed in a system that drains them of their sense of vocation.