Watch “How many friends can you have?” on YouTube

How many friends can you have? Are there benefits to having friends? It turns out that friendship is important to most animals, for reasons explained in the video. The number of friends an animal tends to have our called the Dunbar Number. Humans tend to have a maximum of about 150 friends (Dunbar Number of 150), three times as many acquaintances (450), and three times as many casual acquaintances (1,350).

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