Thou shalt not require the Ten Commandments to be posted in public schools

Gov. Jeff Landry of Louisiana signed a bill this month requiring the state’s public schools, colleges and universities to display the Ten Commandments in every classroom. Posters must be no smaller than 11 by 14 inches, featuring the Commandments in “large, easily readable font.”

Anticipating a court challenge, State Sen. Jay Morris declared that the purpose of the bill “is not solely religious.” And the text of the legislation deems the Ten Commandments a “foundational document in...