The U.S. Supreme Court will hear oral argument in Bristol Myers Squibb v. Superior Court, a critically important personal jurisdiction case. An adverse ruling in this case would pose a serious threat to the ongoing viability of much mass tort litigation in state court.

For all the talk in recent decades of the danger lead poisoning poses to the most precious among us — our children — lead is still a commonly found substance in at least 4 million American households, showing up in chipped paint, contaminated water, dirt and dust.