Keeping ideology in its place

Most people don't want their teachers, scientists, or journalists to be too ideological. Calling someone an "ideologue" isn't a compliment. But what is ideology and why exactly is it a threat? I propose that ideology is fruitfully understood in terms of three ingredients: a basic moral claim, a worldview built on top of that claim, and the attempt to politicize this worldview by injecting it into social institutions. I further argue that the central danger of ideology is that activating these three ingredients tends to undermine liberal social institutions. And yet a certain amount of ideology is both unavoidable and desirable, as I show, since it supplies us with important goods like social cohesion and mobilization. This means the best we can do is to try and set boundaries on ideology.