If you enjoyed John Hood’s column this morning contrasting political quarrels with arguments, you might want to add Thomas Sowell‘s latest column to your reading list.

It is always amazing how many serious issues are not discussed seriously, but, instead, people simply generate assertions and counter-assertions. On television talk shows, people on opposite sides often just try to shout each other down. There is a remarkable range of ways of seeming to argue without actually producing any coherent argument.

Decades of dumbed-down education no doubt have something to do with this, but there is more to it than that. Education is not merely neglected in many of our schools today, but is replaced to a great extent by ideological indoctrination. Moreover, it is largely indoctrination based on the same set of underlying and unexamined assumptions among teachers and institutions.

If our educational institutions — from the schools to the universities — were as interested in a diversity of ideas as they are obsessed with racial diversity, students would at least gain experience in seeing the assumptions behind different visions and the role of logic and evidence in debating those differences.

Instead, a student can go all the way from elementary school to a Ph.D. without encountering any vision of the world that’s fundamentally different from the prevailing political correctness. Moreover, the moral perspective that goes with this prevailing ideological view is all too often that of people who see themselves as being on the side of the angels against the forces of evil — whether the particular issue at hand is gun control, environmentalism, race, or whatever.

A moral monopoly is the antithesis of a marketplace of ideas. One sign of this sense of moral monopoly among the left intelligentsia is that the institutions most under their control — the schools, colleges, and universities — have far less freedom of speech than the rest of American society.