In which decade did punk rock primarily challenge mainstream conventions?

Punk rock primarily challenged mainstream conventions in the 1970s, making it a significant cultural movement during that decade. The emergence of punk was characterized by a rebellious attitude against the established music norms, embracing simplicity, raw energy, and a DIY ethic. Bands like the Ramones, Sex Pistols, and The Clash burst onto the scene, often with a sound that was deliberately abrasive and fast-paced, which starkly contrasted with the polished production of mainstream rock at the time.

This period saw a festival of ideas that encouraged artists to express dissent and critique societal norms, covering themes like anti-establishment sentiments and human rights. Punk's impact was not just musical; it also influenced fashion, language, and youth culture, instigating a broader movement that questioned authority and traditional values in society. The legacy of 1970s punk continues to resonate in many forms of music today, underlining the profound effect it had on the trajectory of popular music and culture.