The Supreme Court has increasingly called upon new findings in neuroscience and psychology in a series of rulings over the past decade (Roper v. Simmons, Graham v. Florida, Miller v. Alabama and Montgomery v. Louisiana) that prohibited harsh punishments—such as the death penalty and mandatory life without parole—for offenders under 18. Due to their immaturity, the argument goes, they are less culpable and so deserve less punishment than those 18 or older. Now people are questioning whether the age of 18 has any scientific meaning. Read more…