If any one band could be held responsible for both the greatest and worst sludge ever foistered on the rock music community, it would be Black Sabbath.
Sab inspired people who never should've taken up musical instruments to do so anyway, and they also inspired many others who might not have had the guts otherwise.
They made a glorious noise that often sounds like a band playing at the wrong speed. It is this "wrongness" that cast a light for millions.
And without any intention on their part led to everything from the rise of the moshpit to endless festivals where young people get very dirty and listen to hundreds of bands pay tribute in their own very loud way.