Evolution: The Best of Iron Butterfly

Evolution: The Best of Iron Butterfly is a greatest hits album released in 1971 by Iron Butterfly. Songs come from four of their albums: Heavy, In-A-Gadda-Da-Vida, Ball, and Metamorphosis.

Track listing

Side one

1. "Iron Butterfly Theme" (Doug Ingle) – 4:34
2. "Possession" (Ingle) – 2:45
3. "Unconscious Power" (Ingle, Danny Weis, Ron Bushy) – 2:32
4. "Flowers and Beads" (Ingle) – 3:05
5. "Termination" (Erik Braunn) – 3:00
6. "In-A-Gadda-Da-Vida (45 RPM single edit)" (Ingle) – 2:52

Side two

1. "Soul Experience" (Ingle, Bushy, Braunn, Lee Dorman) – 2:53
2. "Stone Believer" (Ingle, Bushy, Dorman) – 4:25
3. "Belda-Beast" (Braunn) – 5:45
4. "Easy Rider" (Ingle, Bushy, Dorman, Robert Woods Edmonson) – 3:06
5. "Slower Than Guns" (Ingle, Bushy, Dorman, Edmonson) – 3:22

Band members

• Doug Ingle – lead vocals (except where indicated), organs
• Jerry Penrod – bass on Side 1 tracks 1–3
• Darryl DeLoach – tambourine and backing vocals on Side 1 tracks 1–3
• Danny Weis – guitars on Side 1 tracks 1–3
• Erik Brann – guitars on Side 1 tracks 4–6 and Side 2 tracks 1 & 3, lead vocals on "Termination" and "Belda-Beast"
• Lee Dorman – bass and backing vocals on Side 1 tracks 4-6 and all Side 2 tracks
• Ron Bushy – drums
• Mike Pinera – guitar on Side 2 tracks 2, 4 & 5, additional lead vocal on "Stone Believer"
• Larry "Rhino" Reinhardt – guitar on Side 2 tracks 2, 4 & 5