Art.
Culture.
Society.
Motion pictures.
Music.
Electricity.
Clothing.
Diners.
Great human achievements without which life would not be as it is today. True, very true.
But you don't now this, and no one's aware, but there's one reason and one MAIN reason, a driving reason, an ultimate reason why all of these were invented, one final and dedicated event in human development, the omega point of our achievement as a race, a people, an entity, a power.
The reason we came down from the trees, and proof that we deserved the right.
Everything else...
...is incidental.