漆黑的sustain_sustained_sustain 84(9)

And this is one of the first images we made to study this phenomenon. Again, a social network, but now we color the people yellow if theyre happy and blue if theyre sad and green in between. And if you look at this image, you can right away see clusters of happy and unhappy people, again, spreading to three degrees of separation. And you might form the intuition that the unhappy people occupy a different structural location within the network. Theres a middle and an edge to this network, and the unhappy people seem to be located at the edges. So to invoke another metaphor, if you imagine social networks as a kind of vast fabric of humanity -- Im connected to you and you to her, on out endlessly into the distance -- this fabric is actually like an old-fashioned American quilt, and it has patches on it: happy and unhappy patches. And whether you become happy or not depends in part on whether you occupy a happy patch.

这是我们用来研究这一现象所做出的早期图象之一。同样是一个社会网络，不过这一次我们把快乐的人涂成了，难过的人涂成了蓝色，介于两者之间的人涂成了绿色。如果你看看这幅图片，你立马就能看到快乐的人和不快乐的人扎堆出现，同样地是传递到三层分离关系。你的直觉也许会告诉你不快乐的人在这个网络中占据着一个不同的结构点。这个网络有个中心部分、有个边缘地带，而不快乐的人好像都集中在边缘地带。再打个比方，如果你把这些社区网络想象成是一大块人类的绸缎──我与你相连，你和她相连，无止境地延伸──这块绸缎就好像是美国老式的被子一样，上面是一块块的补丁，有快乐的补丁，也有不快乐的。而你快乐与否就决定于你是否身处一块快乐补丁上。

So, this work with emotions, which are so fundamental, then got us to thinking about: Maybe the fundamental causes of human social networks are somehow encoded in our genes. Because human social networks, whenever they are mapped, always kind of look like this: the picture of the network. But they never look like this. Why do they not look like this? Why dont we form human social networks that look like a regular lattice? Well, the striking patterns of human social networks, their ubiquity and their apparent purpose beg questions about whether we evolved to have human social networks in the first place, and whether we evolved to form networks with a particular structure.

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