"For What It's Worth" is a song written by Stephen Stills. It was performed by Buffalo Springfield, recorded on December 5, 1966, and released as a single in January 1967; it was later added to the re-release of their first album, Buffalo Springfield.

The single peaked at number seven on the Billboard Hot 100 chart. This song is currently ranked #63 on Rolling Stone's list of The 500 Greatest Songs of All Time as well as the eighth best song of 1967 by Acclaimed Music.

The song's title appears nowhere in its lyrics; it is more easily remembered by the first line of the chorus: "Stop, children, what's that sound?"

Although "For What It's Worth" is often mistaken as an anti-war song, Stephen Stills was inspired to write the track because of the Sunset Strip curfew riots in November 1966. The trouble, which started during the early stages of the counterculture era, was in the same year Buffalo Springfield had become the house band at the Whisky a Go Go on the Sunset Strip in Los Angeles.

It was within this period that local residents and businesses had become increasingly annoyed by late-night traffic congestion caused by crowds of young people going to clubs and music venues along the Strip. In response they lobbied the city to pass local ordinances that stopped loitering and enforced a strict curfew on the Strip after 10pm. However young music fans felt the new laws were an infringement of their civil rights.

On Saturday, November 12, 1966, fliers were distributed on Sunset Strip inviting people to join demonstrations later that day. Several of Los Angeles' rock radio stations also announced that a rally would be held outside the Pandora's Box club on the corner of Sunset Boulevard and Crescent Heights. That evening as many as 1,000 young demonstrators, including future celebrities like Jack Nicholson and Peter Fonda (who was handcuffed by police), gathered to protest against the enforcement of the curfew laws. Although the rallies began peacefully, trouble eventually broke out among the protesters and police. The unrest continued the next night and periodically throughout the rest of November and December forcing some clubs to shut down within weeks.

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