Historical progressivism is an ideology whose American avatars, like Woodrow Wilson, saw progress as the inevitable outcome of human affairs. Of course, liberals and conservatives believe that their policies will result in positive outcomes, too. But it is another thing to say, as American Progressives did, that the contemporary political task was to identify a destination, grip the wheel and depress the accelerator.
The basic premise of liberal politics, by contrast, is the capacity of government to do good, especially in ameliorating economic ills. Nothing structurally impedes compromise between conservatives, who hold that the accumulated wisdom of tradition is a better guide than the hypercharged rationality of the present, and liberals, because both philosophies exist on a spectrum.
The author is By Greg Weiner and you can read the rest here.