Libertarian perspectives on foreign intervention started as a reaction to the Cold War mentality of military interventionism promoted by American conservatives like William F. Buckley Jr. which had supplanted Old Right non-interventionism. The Vietnam War split the uneasy alliance between growing numbers of self-identified libertarians and the Cold War conservatives. Libertarians opposed to the war joined the draft resistance and peace movements and created organizations such as Students for a Democratic Society. The split was aggravated at the 1969 Young Americans for Freedom convention where the burning of a draft card sparked physical confrontations among convention attendees, a walkout by many libertarians, and the creation of antiwar libertarian organizations. Left-libertarians genera