You Don't Have To Cry is a Stephen Stills tune that really brought the three superstars together and start the band. It was featured on their eponymous debut album in 1969. The accompaniment featured Stills' fingerpicking/fingerstrumming technique backing up the three part harmony that came to define their sound.
The guitar is tuned to Double Dropped D, with both 'E' strings tuned down a whole step. The lesson goes into a few different approaches to the guitar part, even including some of the fills that Stills added in overdubbed parts.