Stretching across nearly 50 years, the definition of hard rock music from its early days is almost unrecognizable by today’s standards. Classic rock, proto-metal, garage rock, punk, traditional metal, thrash, glam, death metal, black metal, sludge, hardcore punk, grunge and everything else outside, in between and combined now represents our general understanding of the all-encompassing genre.
But how did all of these styles come to be? Of course, the prime movers of each genre can be traced, which is just what we’ve done here! Examining those who changed the game of rock altogether, we’re looking at the albums that had the most profound impact on entire scenes or even something less grandiose but still unequivocally crucial like a certain playing technique.