Abortion, and Roe v. Wade, is in the news again as the Supreme Court prepares to review challenges to the Mississippi law which, if upheld, would amount to an overrule of Roe.  Professor Amar tells us that the argument, in addition to discussions of abortion itself, will center on the role of precedent.  To prepare us for an examination of the particulars of this case, he conducts a master class on precedent.  Akhil has written extensively and authoritatively on this over the years; our audience will thus be among the most informed and comprehending spectators when oral argument takes place in December.  We will follow this next week, as we did in the recent gun case, by applying the principles just covered to the actual case.