We kind of suspected it: relationships are worth so much more than many things we usually strive after (career, money, property…). When you want true happiness, claims David Brooks in ‘Social Animal’, your best investments are many, trusting and deep relationships. A good marriage is apparently worth $120,000 a year just by itself. (Dr de Bergerac thinks this is an understatement.) Every friendship, multiplied by its depth, adds to the happiness income.

So there we go. Starting next week, make sure to leave your desk at 5pm sharp and call up your buddy instead of reviewing the accounts once more.