Acid Western is a sub-genre of the Western film that emerged in the 1960s and 1970s that combines the metaphorical ambitions of critically acclaimed Westerns, like Shane and The Searchers, with the excesses of the Spaghetti Westerns and the outlook of the 1960s counter-culture. Acid Westerns subvert many of the conventions of earlier Westerns to "conjure up a crazed version of autodestructive white America at its most solipsistic, hankering after its own lost origins."