Happiness is a powerful emotion. It has been associated with having a healthier hearta stronger immune system and a longer life. But the main reason we’re attracted to it is because it feels so good. That’s the reason it is the final objective of almost the entire bookshelf of the self-help industry: stronger relationships, more money, greater sense of purpose, higher success, a more desirable job – in one way or another these make us feel happy, at least for a period of time. It is also the reason that the self-help industry is worth more than $11 billion a year in the US alone, and the global depression drug market is poised to surge to $16.80 billion by 2020. Everyone is after the happy kick, whether they find it in a book, a podcast or a pill.