| Happiness is catching. Happiness spreads through | | | | Christakis, is the first of its kind to demonstrate the |
| friends, spouses, siblings and neighbors. There is a | | | | existence of clusters of happy and sad individuals. |
| ripple effect whereby happiness extends widely | | | | Happiness depends upon the happiness of those |
| through social networks, even between people who | | | | around them. Whatâs more, individuals who |
| may not know one another. Oneâs happiness | | | | surround themselves with happy people are more likely |
| depends on the degree of happiness of those | | | | to be happy in the future. Oneâs future |
| surrounding her. | | | | happiness can actually be predicted by the number of |
| Happiness depends upon the happiness of those | | | | happy people surrounding them and the degree to |
| around them | | | | which the social network as a whole experiences |
| A study performed at Harvard University, by Nicholas | | | | constructive emotions, such as happiness. |