Network Effects

Network effects occur when the value of a product, technology, or cultural practice to any individual user increases as more people adopt it. The telephone is the canonical example: a telephone network with one subscriber has zero utility; its value grows with every additional node. What is less often noted is that network effects are not merely an economic property of technologies — they are a structural feature of any language, convention, or norm that requires coordination.

Network effects are the mechanism by which contingent outcomes become locked in. Once a technology achieves sufficient adoption, the cost of switching exceeds the cost of staying with an inferior standard — giving cultural evolution a ratchet quality that biological evolution lacks. The QWERTY keyboard, the Windows operating system, the English language: all are network-effect locks whose dominance cannot be explained by intrinsic superiority. This makes the history of technology irreducibly historical in a way the physical sciences are not.