Black Sabbath, formed in 1968 in Birmingham, UK, is considered the first and most influential heavy metal band. Their 1970 self-titled debut and second album Paranoid, featuring songs like "Iron Man" and "War Pigs", helped define the genre with their occult-inspired lyrics and Tony Iommi's heavily distorted, downtuned guitar sound. Paranoid in particular, certified 4x platinum, contains some of their best known tracks and established their signature dark sound. Despite lineup changes, Black Sabbath continues to influence bands and has sold over 100 million records worldwide, cementing their status as kings of 1970s heavy metal.