Rush only recorded one album before Neil Peart joined. That album (entitled "Rush") sounds just like an early Zeppelin album, and IT'S AWESOME. But it is definitely not the progressive anthems you think of when you think of RUSH, and that's partly thanks to Neil Peart. Being a huge sci-fi and fantasy nerd, his lyrics were full of references to Lord Of The Rings and fantasy tropes, and the other members were equally behind the idea of making long-ass, multi-part journeys with odd time signatures. Thus, Rush was born! Hooray!