Western Music is a broad category including all music genres. The first western song was written back in 1844. Western Music generally talks about the working class, mountain men, the 49ers, the immigrants, the outlaws, lawmen, the cowboy and the scenic beauty of the west.

The musical genres included in Western Music use 12 - note chromatic scale. Based on the 12 - note chromatic scale, Western Music is further divided into many types like classical music, rock and roll and other popular music.

Popular music is also a branch of Western Music that is not often included in the studies of the Western Music. The classical Western Music is often used in churches and the elite class. Some of the genres of western descent popular music include country, western and rock and roll, etc.
Western Music has not only emerged from the west only, but Russia and Japan is also one of the major contributors of Western Music. It was basically developed from the western philosophy in the ancient Greece.

The creatively fertile framework of the western philosophy and Pythagoras' experiment on the small sound intervals are responsible for the invention of the world famous, 12 - note, chromatic scale.

This invention leads to the development of the early Christian tradition's chants, that is, the monophonic that leads to the polyphonic and then the more advanced instruments.

Western Music was initially originated as the form of folk music which was written and composed on the people who worked throughout the United States and Canada (western parts). Western Music contains old English, Scottish, and Irish folk ballads. 
Many a tradition influenced the origin and the present form of the western music, including the Mexican music. Western Music is called Western because only the western part of the United States took part in its origination.