Ever since music was composed they were mostly used in the religious, symbolic and warlike context. They made you go into a state of being that whatever the occasion was, you would feel it. As time went on, man has also incorporated words into music, allowing us to express our feelings in ways music cannot. Before you get confused, music and songs are different. A lot of people would mistakenly say that they are the same only to say otherwise.
Fast forward to the present. Nowadays the airwaves are filled with pieces that we pass off as music - Lady Gaga, Justin Bieber and so on. If you've noticed, these "musicians" manage to take the world by storm sometimes in a month or less. Then they rise to the top of the tower of fame and as time goes by, for some reason, stop making music and only do collaborations with others. Looking back to these "musicians" they never really leave a mark for music in this world.
A snippet from the Marriam-Webster's dictionary on the definition of music
noun, often attributive \ˈmyü-zik\
a : the science or art of ordering tones or sounds in succession, in combination, and in temporal relationships to produce a composition having unity and continuity
b : vocal, instrumental, or mechanical sounds having rhythm, melody, or harmony
A snippet from the same dictionary on the definition of song(s)
1 : the act or art of singing
2 : poetical composition
a : a short musical composition of words and music
b : a collection of such compositions
a : a melody for a lyric poem or ballad
And that's that on their differences.b : a poem easily set to music
Reverse Fast Forward
Fast forward backwards to when musical compositions were hand made by musicians ON THEIR OWN which express a certain emotion. Granted there were many composers back in the day and some never even became famous yet they were inspired by others before them - it's a cycle. Music is timeless and indeed it has been grossly perverted in many ways than one but one may supposed that as a necessary evil, a double-edged sword if you will.
The music may be crap nowadays, but thankfully Music is still alive and kicking.