While the Libertarian Party and the Green Party have the members, they don't really pull off any elections in the end. However you figure one of them was the oldest, but they're not even close. The Prohibition Party was founded in 1869, and while there has been a few name changes it's now restored back to it's original form. While the original party helped the ban of alcohol (and we saw how well that worked...) the party is now full of social conservatives who wish to ban gambling, drugs, alcohol, same-sex marriage, more adult forms of entertainment, among other things. They received only 643 votes in the 2008 Presidential Election.