Six degrees of dating
It's important not to get too fixated on the "six" in "six degrees of separation." This number is motivated by the results of the famous Milgram experiment on social networks, which I'll discuss in more detail later.
Social networks tend to have close to, but not exactly, this structure.
However, it can also occur, for instance, in the neural network of C.
elegans, where nodes represent neurons and links represent synapses .
The original empirical demonstration of the effect was, in fact, in a social network.
In the 1960s, Stanley Milgram sent 96 packages to randomly chosen individuals in Omaha, Nebraska.