English legal commentator William Blackstone described the writ of habeas corpus as a second Magna Carta, and Supreme Court Chief Justice John Marshall called it the "great writ." It has been part of the Anglo-American common law tradition since the Middle Ages. In the United States, it has been a source of tension between state and…

In September, Oxford University Press published "Not a Suicide Pact: The Constitution in a Time of National Emergency," written by Richard Posner, a judge on the U.S. Court of Appeals for the Seventh Circuit. Judge Posner's book, which explores how people might strike a balance between constitutionally protected liberties and security concerns…