There are also many theories of happiness, such as in the book I am readying "The Happiness Hypothesis", some argue the happiness is from within, take things as they come, many believe the happiness is from without, getting things we want.
The enpiphy is, all these human enjoyment come from the same source - connecting with others.
Learning with other students, even those one dislike, is far more effective and enjoyable than learning alone. Almost everyone unhappy feel "disconnected" "lonely" "isoliated".
Being innovative has to be have rich, frequent and diverse connection with all type of people and ideas. That is why a society celebrate diversity and loving each other will always out innovate the ones that enforce homogeneity and uniformity.
The good school connect students 
and faculty, the great leaders connect all the follower to their mission and to each other.
How to building meanfully and long lasting connect become the secret formula of happiness, and all human achievement for that matter.
Connect!
