Because Morty refuses to revive him, Rick’s consciousness is routed through into clone bodies in other dimensions.
Rick repeatedly awakens in worlds ruled by fascists (including "Fascist Shrimp" and "Fascist Teddy Bear" universes) and is killed each time he fails to comply with their ideology. Rick and Morty Season 4 Episode 01 (S04E01)
Morty uses Rick's advanced weaponry to go on a rampage, eventually transforming into a giant, sentient ferrofluid monster—a direct homage to the anime Akira . Subplot: Rick's Multi-Dimensional Rebirth Because Morty refuses to revive him, Rick’s consciousness
He finally lands in a "wholesome" Wasp dimension that isn't fascist. The Wasp Rick helps him return to his home reality to deal with Morty. Because Morty refuses to revive him
Morty's erratic steering to stay on his "path" causes a crash that impales and kills Rick.