Here's an eloquent bit of editorializing on government, violence, and coercion from Richmond Times-Dispatch columnist A. Barton Hinkle.
The debate over the size and scope of government, then, is an argument over when to use violence to change things and circumstances consensual activity cannot. Liberals (broadly speaking) find inequality odious and think the government should use force in the economic arena by redistributing wealth but leave individuals alone in matters of personal morality, such as whom they have sex with. Conservatives (broadly speaking) are less troubled by inequality and disdain the redistributive uses of government power. But social conservatives are outraged by immorality, as they define it, and therefore think the state should use the threat of violence to enforce personal moral codes by banning prostitution, homosexual sodomy, and the like.
Then there are a small minority of diehard libertarians who would like to minimize government involvement in both arenas, and a small minority of diehard communitarians who think government should dictate behavior of every stripe…
Force is sometimes necessary. We must have police and courts and national defense and environmental protection and so on. But government at all levels does much more nowadays than is strictly necessary, because both liberals and conservatives delight in using it to make other people do what they would not do through mutual consent.
In the wake of the butchery in Tucson, it has been nice to hear many people say we should not speak so well of violence. It would be even nicer to hear more say we should not vote for it quite so often, either.