From a new article posted at Deathmetal.org:

In my view, music is a cognitive hack. It taps into a number of different pre-existing ways that our brain uses to interact with and make sense of the external world, not least our inherent hard wiring for pattern recognition and the (evolutionarily useful) enjoyment of discovery, surprise and invention.

[…]

Looking at some of the most obvious descriptions we tend to attach to metal music: ‘assertive’, ‘violent’, ‘primitive’… Perhaps these descriptors aren’t really all that arbitrary or socially-defined; rather the music really does hearken back to things you could fairly associate with those descriptions.

Imagine the sounds of primates screaming at each other as they bite and tear shreds off one another, the din of battle, etc. These impressions embedded somewhere inside our psychology from generations past are brought to the forefront by metal. If rock ‘n roll is the rhythm of sex, then metal is the rhythm of battle, of running, of methodically tracking then pounding the skulls in of prey.

Read more @ Deathmetal.org