The protest is one of the most common forms of a public display of disapproval over an issue. Whether its social, governmental or anything else, heavy music, be it rock, punk or metal, has been there to channel this energy into a caustic sonic form.

In this Loud List, we're celebrating the bands who have authored some of the most enduring and battle-tested protest anthems ever! These songs have been a central piece for listeners to rally behind, especially united under a like-minded purpose. It goes without saying that Rage Against the Machine were one of the most effective groups when it came to igniting a passion and inner sense of duty with forward-thinking lyrics that were both topical and thought-provoking.

Other songs, like Twisted Sister's "We're Not Gonna Take It," took a less specific approach, with the focus being more on empowerment in any downtrodden situation, serving as a conch-call to stand up and take ownership of the situation. It's one of the most iconic songs in rock history for its role in the infamous PMRC era as well as a staple of angst and defiance.

Watch the video above as we count down the 10 Greatest Hard Rock + Metal Protest Anthems!

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