The past is no longer prologue on many campuses. The American Council of Trustees and Alumni — a nonprofit that supports an increase of college-level civic education — has released a new survey to support that idea. It reveals the “alarming” things that supposedly well-educated millennials actually believe, primarily due to faulty academics.

The new poll of 1,002 college graduates finds that 26% of them say Brett M. Kavanaugh is the chief justice of the U.S. Supreme Court, while 14% of respondents selected Antonin Scalia, who died in 2016. Fewer than half correctly identified John G. Roberts J...