Forty-five years ago this month, Mothers Against Drunk Driving had its first national press conference, and a global movement to stop impaired driving was born. MADD was founded by Candace Lightner after her 13-year-old daughter was struck and killed by a drunk driver while walking to a church carnival in 1980. Terms like “designated driver” and the slogan “Friends don’t let friends drive drunk” came out of MADD’s campaigning, and a variety of state and federal laws, like a lowered blood alcohol limit and legal drinking age, were instituted thanks to their advocacy. Over time, social norms evolved, and driving drunk was no longer seen as a “folk crime,” but a serious, conscious choice with serious consequences.

Movements like this one, started by fed-up, grieving parents working with law enforcement and law makers, worked to lower road fatalities nationwide, inspire similar campaigns in other countries, and saved countless lives.