A classical liberal was characteristically guided by disinterested logic and reason. He was open to gradual changes in society that were frowned upon by traditionalists in lockstep adherence to custom and protocol. The eight-hour work day, civil rights, and food- and drug-safety laws all grew out of classically liberal views. Government could press for moderate changes in the way society worked, within a conservative framework of revering the past, in order to pave the way for equality of opportunity in a safe and sane environment. Among elite liberals today, all too few are of this classical mold — guided by...