幸福是一种选择：关于幸福的12个有趣真相

Trust, freedom, equality and social interactions increase happiness
信任、自由、平等和社交互动能够提升幸福感

Individual happiness comes from a set of social interactions, and trust plays a huge role. In a well-functioning society there is a high level of trust between citizens and between institutions.
个人的快乐幸福来自于一系列的社交互动，在这其中信任起着重要作用。在一个运行良好的社会中，公民与制度之间存在着一个很高程度的信任。

Bonding capital i.e. people who are similar to one another and bridging capital i.e. people who are different impacts life satisfaction and happiness. "We want both - not only good social capital within communities but also good links between communities."
社会资本指的是很相似的一群人，而桥梁资本则指的是生活满意度和幸福感影响程度不同的人们。“我们两者都想要，不仅是需要团体内部的社会资本，也需要社会团体间良好的链接。”

Freedom is a key component to happiness.
自由是幸福的关键因素。

Equality plays a huge role in happiness because greater equality is associated with reduced social tensions, especially when the inequality is seen as unfair. Also, the value of extra income is greater for the rich than the poor.
在幸福感的影响因素中，平等也非常重要，因为较大程度的平等意味着社会紧张感的减少，特别是在不平等会等同于不公平的状态下。同样，额外收入对于富人的价值要比其对穷人的价值大。