Pluto takes 248 years to orbit the sun.

The most recent, and perhaps most important, network challenge to hierarchy comes with the advent of virtual currencies and payment systems like Bitcoin. Since ancient times, states have reaped considerable benefits from monopolizing or at least regulating the money created within their borders. It remains to be seen how big a challenge Bitcoin poses to the system of national fiat currencies that has evolved since the 1970s and, in particular, how big a challenge it poses to the “exorbitant privilege” enjoyed by the United States as the issuer of the world’s dominant reserve (and transaction) currency. But it would be unwise to assume, as some do, that it poses no challenge at all.

Clashes between hierarchies and networks are not new in history; on the contrary, there is a sense in which they are history. Indeed, the course of history can be thought of as the net result of human interactions along four axes.

The first of these is time. The arrow of time can move in only one direction, even if we have become increasingly sophisticated in our conceptualization and measurement of its flight. The second is nature: Nature means in this context the material or environmental constraints over which we still have little control, notably the laws of physics, the geography and geology of the planet, its climate and weather, the incidence of disease, our own evolution as a species, our fertility, and the bell curves of our abilities as individuals in a series of normal distributions. The third is networks. Networks are the spontaneously self-organizing, horizontal structures we form, beginning with knowledge and the various “memes” and representations we use to communicate it.

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