The simple bumper sticker has evolved remarkably from Forrest P. Gill's ingenious 1940s invention to today's sophistic ...

The mother hen of bumper stickers (and buttons, T-shirts and other political knickknacks) is Bertha McDaniel, 74, who Berendt says, "has made it her mission in life to get a bumper strip on every ...

We don't know much about bumper sticker demographics. What we do know is that the bumper sticker has now merged into the larger attack culture of slogans and sound bites.

Wallach notes that, in the 1970s, bumper stickers often carried a liberal message. But in recent years, conservatives have been more likely to use the tiny billboards to boost their agenda.