Analysis of information sources in references of the Wikipedia article "Undertow (Tool album)" in English language version.
Just as grunge was reaching its boiling point and radio-friendly punk-pop loomed on the horizon, Tool released Undertow, which firmly reinforced metal's prominence as a musical style [...] With its technical brilliance, musical complexities, and aggressive overtones, Undertow not only paved the way for several bands to break through to the mainstream [...], it also proved that metal could be simultaneously intelligent, emotional, and brutal.
It came as no surprise when Walmart and Kmart refused to carry the album. Rather than miss out on a large audience, Tool decided to censor itself and released a plain white album cover that contained nothing more than a giant bar code, the band's name, and the album tracks.
