Across the U.S., efforts are underway to make it easier to involuntarily commit people to psychiatric hospitals. It's a reaction to the sight of seriously mentally ill people on the streets and the cries of families who say it's too hard to get a loved one help when they're in crisis. But this gets at one of the most delicate questions our society has faced: When does our belief about what's best for someone override someone's right to decide for themselves?