I agree with Mayhem when he takes on the role of "anti Scaruffi," which seems to be the attitude of many, including his detractor Senmayan...
However, we reach a point (like with art, Imho...) where subjectivity cannot exist and we must conform to a truth, perhaps unpleasant and antithetical (to us), maybe stated by others, certainly, but unequivocally sacred...
The Black Sabbath invented Heavy Metal. Period. No ifs, ands, or buts...
There are no Amon Duul, Jacula, Steppenwolf, Mc5, Cream, and countless others that could even scratch a nanometer of this truth...
The first two albums are the Genesis, they are the extreme consequence of "electric blues," brought into a no-return territory... I donāt even consider them Hard Rock, can you believe that... Never thought of Paranoid or BS as Hard Rock... Theyāre not even Amon Duul II, who played āspatialā Kraut Rock, indebted (or maybe it's the other way around) to bands like Hawkwind, Popol Vuh, Ash Ra Tempel...
Without a doubt, the Sabbath were much closer to obscure underground bands (as Mayhem rightly pointed out) like KISS INC or SHIVER (now forgotten that were contemporaries of Zeppelin, Purple, Stooges, and the raucous Anglo-American crew...
If thatās the case, even the Velvet Underground had a "doom" dimension in their music, but would anyone ever think of classifying them as Hard Rock? (letās skip metal)... Even the earliest "Tangerine Dream" expressed hallucinatory and astounding journeys, but they are not Hard Rock... Itās like saying: "if a song has a flute and an odd time signature then itās PROG..." And who said that? Just as being "doom" or "Metal" doesnāt necessarily require (who said Stoner?!?) slow tempos, raw and syncopated riffs... At this point, Popol Vuh and Tangerine Dream were also metal...
A clank of distorted guitars does not make METAL, maybe Hard Rock... Because otherwise, even Creedence Clearwater Revival, Hendrix, Doors, Blue Cheer, Steppenwolf would be METAL... And itās not enough that a song by the latter had the phrase "Heavy metal thunder," from which a witty journalist birthed (ipse dixit) Heavy Metal...
And where do we put Iron Butterfly? In-A-Gadda-Da-Vida? Was that metal? NO. It was Heavy Rock... ROCK, not metal...
And Uriah Heep, a great and highly underrated English band? They played HARD PROG... A mix between Progressive and Hard Rock that was fundamental for the birth and development IN AMERICA of the genre that would be called AOR (Adult Oriented Rock)...
And the Sabbath?
With their third album, with TRACK ONE, they invented METAL... Yes, because SWEET LEAF, as far as I'm concerned, is no longer Hard Rock, is not even Heavy Rock, is not Prog, is nothing... Or rather: itās the year zero of METAL... Followed by the famous (a song on which a book wouldnāt be enough) "Children of the grave," which founded metal not only musically, but especially iconographically... That ride of bass/drums/guitar (Gibson) I believe is, alongside the riff of "satisfaction" by the Stones and a very few other things, the most important thing in the history of rock... And thereās not much to discuss... Just have the ears...
What they did afterward (Vol4) is LUXURIOUS Routine, up until HEAVEN AND HELL (another milestone this time of the so-called NWOBHM)... Although, between us, the NWOBHM was actually started by the Sabbath back in ā69 when they began recording their self-titled album...
The rest, gentlemen, is beautiful, gorgeous, musically superior, no doubt... There have been dozens of bands that could wipe the floor with the Sabbath musically (some I have mentioned), but without these four misfits from Birmingham, TODAY Rock would be much, much poorer...
Best regards.