"Before the Great Collapse" is a single by Hip Hop duo Jedi Mind Tricks, released in 2004 through Babygrande Records. The single was the lead-off for the group's fourth album, Legacy of Blood. The song's intro contains a sample from "Freeman's Farm" by David Elon Preston, and the song's music contains a sample from "No Me Des Tu Adios" by Perla. "Before the Great Collapse" was the first JMT single to be solely performed by group vocalist Vinnie Paz, who uses the track as a suicide letter, written to his mother. The track is followed up on JMT's Servants in Heaven, Kings in Hell with the track Razorblade Salvation, in which Vinnie Paz retracts his suicide note, citing his obligations and goals as reasons to "stick around for a while."
While "Before the Great Collapse" was the single's official A-Side, the B-Side track "On the Eve of War" was Legacy of Blood's lead single. Like their previous album's lead single, "Animal Rap", the single contains two mixes of the song, subtitled "On the Eve of War (Julio Cesar Chavez Mix)" and "On the Eve of War (Meldrick Taylor Mix)", referencing the rivalry between the two boxers. The former features a symphonic sample, taken from the track "Palladio I - Allegretto" by Karl Jenkins. The latter features a melancholy guitar sample taken from the track "Peace" by Paul Kelly. Both versions of "On the Eve of War" feature a guest appearance from Wu-Tang Clan member GZA. The single was followed in 2005 by "The Age of Sacred Terror".