The Importance of Doing Useless Things-Richard Dawkins
From poetry and ballet to mathematics and being clever, life is laden with frivolous pursuits that hold no bearing on our ability to survive. However, Dawkins explains that the ability to perform such actions comes as a byproduct of the evolution of the human brain, perhaps because being clever is sexy.
Involvement of human mind in several tasks even in day to day life, helps it in unknowingly evolving survival tactics. That is the reason people in different places, different situations nurture their mind differently.