Every phenomena depends upon causes and conditions. When the causes and conditions are present the consequence arises. So if we understand the causes and conditions of happiness we can create it. This means happiness is a subject of study (life’s most important subject). And it is learned. I argue it is the most important subject because, as Aristotle pointed out, happiness is the only goal we pursue as an end in itself and not as a means to something else. We don’t want the things we want — we want the feelings of happiness associated with them.
I explore this point in detail here The Learned Happiness Model (LHM)
The Happiness PhD Project (Encyclopedia)
1B. Happiness lead to success in a variety of life outcomes.