The title of the song is based on an album of the same name released in 1998 by a novelty folk-rock band from Cleveland called 100,000 Leagues Under My Nutsack. Filter's bassist, Frank Cavanagh, was friends with 100,000 Leagues' lead singer, and Richard Patrick liked the album so much that he named the song after it.[4]
In 1999, singer Richard Patrick said, "'Welcome to the Fold' is based on being a crazed lunatic. That's what being a mid-20's decadent bachelor is all about. Not giving a flying fuck. I got money. I got a platinum record. I got a band. I've got everything I want and I don't give a flying fuck what I do."[5] Patrick also described it as his favorite song on the album, and said "it's a 10-minute song with three songs in it."[6]
While the song's verses are screamed and the guitar riff is grinding and abrasive, the chorus is more sedate and chord-driven. Patrick described the milder chorus as "the party at the end of the night. The weekend. The celebration of just the fact that we're doing OK, we feel OK."[2]
Music video
The song's music video (directed by Peter Christopherson) begins with an RV driving through a desert, and a man comes out spotting a giant clear cube, in which the band is performing the song inside of. A man comes out and calls on his radio and soon more people in RVs come and set up camp to watch the concert. During the guitar solo, several of the campers jump inside the cube and do some crowd surfing. At the end of the video, the cube floats up in the air and explodes.