What makes Where the Sour Turns to Sweet by Genesis notable?

While not a commercial success upon release, the album is significant for introducing Genesis's unique sound that would later influence the progressive rock genre. Critics have since acknowledged it as a formative step in their evolution, capturing the essence of late 60s British music with its melodic sophistication. Released as Genesis's debut album in 1969, 'Where the Sour Turns to Sweet' came at a time when the band was still establishing its identity, following their formation in 1967. The album laid the groundwork for their later, more complex works, showcasing early elements of their signature art rock style.