Libertarian Party

The Libertarian Party (LP) is a political party in the United States that promotes civil liberties, non-interventionism, laissez-faire capitalism and the abolition of the welfare state. The party was conceived at meetings in the home of David F. Nolan in Westminster, Colorado in 1971 and was officially formed on December 11, 1971 in Colorado Springs, Colorado. The founding of the party was prompted in part due to concerns about the Nixon administration, the Vietnam War, conscription and the end of the gold standard.
The party generally promotes a classical liberal platform, in contrast to the Democrats' modern liberalism, The Progressives' Social Democratic positions, and the Republicans' social conservatism. Current fiscal policy positions include lowering taxes, abolishing the Internal Revenue Service (IRS), decreasing the national debt, allowing people to opt out of Social Security, and eliminating the welfare state, in part by utilizing private charities. Current cultural policy positions include ending the prohibition of illegal drugs,  supporting same-sex marriage, ending capital punishment, and supporting gun ownership rights. Many Libertarians believe in lowering the drinking age to 18.
It is currently the 4th largest political party in the United States, and it holds one Governorship, Douglas Stephens in Montana. It also holds a few state-level positions and 2 congressional seats. 
The Libertarian Party was the party under which the first electoral vote was cast for a woman (Tonie Nathan) for Vice President in the 1972 United States presidential election due to a faithless elector.