What makes Heavier Than Thou by Saint Vitus notable?

This album is significant for its role in defining the sound of American doom metal during a period of increasing interest in heavy music. Although it did not chart highly, 'Heavier Than Thou' received positive reviews from critics and is often cited as a crucial influence on subsequent doom and stoner metal bands. By the time 'Heavier Than Thou' was released in 1991, Saint Vitus had already established themselves as pioneers of the doom metal genre. This album came four years after their critically acclaimed release 'Born Too Late', solidifying their legacy in a scene that was evolving rapidly during the early '90s.