There were never 4 band members. It started out as Alex, Geddy, and John Rutsey, but due to health issues, John left. That was after the first album, then Fly By Night came around with Neil Peart at the drums. That's how it's been ever since.

Funny clip at the beginning, classic rush for the rest.

Waht hapend to 4 rush members

"A modern day warrior, his name's Tom Sawyer! He floated down the river on a raft with a black guy!" Fricken' hilarious!