Metal: A Headbanger's Journey
"Definitive Metal Family Tree"

Bagan berikut ini menjelaskan pandangan Dunn tentang perkembangan berbagai subgenre metal, dan mencoba mendaftar grup musik yang mewakili setiap kategori.
Early metal (1966 - 1971)
- Cream
- Jimi Hendrix
- Blue Cheer
- Deep Purple
- Led Zeppelin
- MC5
- Mountain
- The Stooges
- Black Sabbath
Original hard rock (1974 - 1979)
- Thin Lizzy
- Blue Öyster Cult
- Aerosmith
- AC/DC
- Ted Nugent
Shock rock (1968 - 1983)
- Arthur Brown
- Alice Cooper
- New York Dolls
- KISS
- Ozzy Osbourne
- W.A.S.P.
Early punk (1976 - 1979)
- The Ramones
- The Damned
- The Sex Pistols
- The Clash
- The Dead Boys
Power metal (1976 - sekarang)
- Scorpions
- Judas Priest
- Rainbow
- Accept
- Manowar
- Dio
- Yngwie J. Malmsteen
- Helloween
- Blind Guardian
- HammerFall
- Primal Fear
New Wave of British Heavy Metal (1979 - 1983)
- Motörhead
- Saxon
- Iron Maiden
- Angel Witch
- Girlschool
- Tygers of Pan Tang
- Diamond Head
Progressive metal (1970 - sekarang)
- Uriah Heep
- Rush
- Queensrÿche
- Savatage
- Fates Warning
- Voivod
- Dream Theater
- Meshuggah
- Symphony X
- Evergrey
Glam metal (1973 - 1990)
- Slade
- Sweet
- Hanoi Rocks
- Mötley Crüe
- Twisted Sister
- Poison
- Cinderella
- Skid Row
Pop metal (1978 - sekarang)
- Quiet Riot
- Van Halen
- Whitesnake
- Def Leppard
- Europe
- Dokken
- Lita Ford
- Ratt
- Guns N' Roses
- Winger
- Warrant
- Doro
- The Darkness
Stoner metal (1982 - sekarang)
- Witchfinder General
- Trouble
- Candlemass
- Kyuss
- Today is the Day
- Cathedral
Original hardcore (1980 - 1986)
- Agnostic Front
- D.O.A.
- Exploited
- Black Flag
- Bad Brains
- The Misfits
- GBH
- Dead Kennedys
- Minor Threat
Thrash metal (1983 - sekarang)
- Metallica
- Slayer
- Anthrax
- Megadeth
- Exodus
- Overkill
- Kreator
- Destruction
- Testament
- Sepultura
- Nuclear Assault
- Death Angel
- Pantera
First wave of black metal (1981 - 1986)
- Venom
- Mercyful Fate
- Bathory
- Celtic Frost
Norwegian black metal (1990 - sekarang)
- Mayhem
- Gorgoroth
- Darkthrone
- Emperor
- Satyricon
- Enslaved
- Dimmu Borgir
- Cradle Of Filth (UK)
Grindcore (1987 - sekarang)
- Napalm Death
- Carcass
- Repulsion
- Brutal Truth
- Cephalic Carnage
Death metal (1985 - sekarang)
- Possessed
- Sodom
- Death
- Morbid Angel
- Obituary
- Deicide
- Cannibal Corpse
- Immolation
- Autopsy
- Nile
Swedish death metal (1990 - sekarang)
- Grave
- Entombed
- At the Gates
- Dismember
- Arch Enemy
- Soilwork
- In Flames
- Dark Tranquility
- The Haunted
Metalcore (1985 - sekarang)
- Corrosion of Conformity
- Suicidal Tendencies
- Dirty Rotten Imbeciles
- Machine Head
- Stormtroopers of Death
- Hatebreed
- The Dillinger Escape Plan
Grunge (1988 - 1993)
- Green River
- The Melvins
- Soundgarden
- Mudhoney
- Nirvana
- Alice In Chains
- Mother Love Bone
- Pearl Jam
- Stone Temple Pilots
Goth metal (1990 - sekarang)
- Paradise Lost
- Tiamat
- Therion
- Type O Negative
- My Dying Bride
- Anathema
- Theatre Of Tragedy
- Opeth
Industrial metal (1988 - sekarang)
- Ministry
- White Zombie
- Godflesh
- Nine Inch Nails
- Fear Factory
- Marilyn Manson
- Static-X
Hard alternative (1989 - sekarang)
- Faith No More
- Jane's Addiction
- Prong
- Living Colour
- The Smashing Pumpkins
- Tool
- Rage Against The Machine
Nu-metal (1994 - sekarang)
- Biohazard
- KoЯn
- Slipknot
- Limp Bizkit
- Godsmack
- Coal Chamber
- Disturbed
- Kittie
- System of a Down
New Wave of American Metal (2000 - sekarang)
- Shadows Fall
- Lamb of God
- Darkest Hour
- Chimaira
- Killswitch Engage
- Unearth
- God Forbid