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So as much as I hate to maths on a parade, that isn't actually very amazing. If everyone only had the median 100 friends this report found, that means you already have 10,000 friends of friends. If you include their 100 friends each, you're at 1 million people within three degrees of separation. At five degrees of separation you have 10 billion people linked to you, which is greater than the Earth's population.
If only having 100 friends each has you linked to everyone else on Earth an average 1.4 times each (so to speak), we shouldn't be amazed that it's a small world after all. We should be asking why we ever thought it was so big.
