Joy Division rapidly evolved from their initial punk rock influences, to develop a sound and style that pioneered the post-punk movement of the late 1970s. According to music critic Jon Savage, the band "were not punk but were directly inspired by its energy". Their self-released 1978 debut EP, An Ideal for Living, caught the attention of the Manchester television personality Tony Wilson. Joy Division's debut album, Unknown Pleasures, was released in 1979 on Wilson's independent record label Factory Records, and drew critical acclaim from the British press. Despite the band's growing success, vocalist Ian Curtis was beset with depression and personal difficulties, including a dissolving marriage and his diagnosis with epilepsy. Curtis found it increasingly difficult to perform at live concerts, and often had seizures during performances.