An animated river of ideas · 500 BCE – 2026

The Observer's River

Ideas about society and mind, seen from above as currents. People are fish, placed where their work entered the water. A current's width shows how much it carried; colours run side by side where currents meet. Higher on the map, the observer looks in; lower, the observer looks at.

Width: how much a current carried Stripes: currents a person carries Thread: a transfer between currents Taper: a current cut off

Fish arrive as the water reaches their year. Slow the speed to ×1/4 or ×1/8 to read each one, or step with the arrows.

Tap a name to light that current and dim the rest. Use the box to hide or show it.

How to read it

Currents are traditions of thought. A current can rise as a trickle long before the person usually credited with it: the organic current flows from Heraclitus to Whitehead, and on past him.
Fish are people, placed at the year of the work that matters here. Later fish swim ahead, downstream. A larger fish named or widened its current.
Stripes on a fish are the other currents that person carried. Carriers such as Bateson, Varela and Devereux are where transfers happen.
Width is an editorial judgement of how much each current carried in Western thought about society and mind. It is not measured.
Colour bands inside a current show what flowed into it and kept its colour. The mainstream at the bottom ends multicoloured, but its slate core stays widest.
Shades of one colour are reinventions: introspection returns as micro-phenomenology; process thought returns as new materialism; Buddhist practice returns as mindfulness.
Height roughly marks where the observer stands: higher is looking in (first person), the middle is being among others, lower is looking at (third person). Anthropology climbs; psychology dives in 1913.
Time is stretched toward the present. The first two thousand years are compressed into the left edge.

Using it

Press play to run from the first springs to 2026, or drag the timeline. The speed menu goes down to ×1/16. The camera follows the water front; drag or pinch to look around, and the target button hands the camera back.
Tap a fish for its card, or a current to light it. The arrows (or the arrow keys) step from fish to fish.

Caveats

Each person appears once, at one work, though most worked across decades. Their cards name other dates.
Ancient dates are traditional or approximate. The Buddha's dates are disputed; the map uses the 5th century BCE.
The selection follows one argument: from anthropology to the postmodern turn, the Buddhist method as a control, therapy as a model at social scale, and the tools that feed psocial. Large traditions outside that path are left out.

Sources

Dates are first-publication years of the works named, compiled by Claude from general knowledge of the standard histories. They have not been checked one by one against a single source, so treat a date as a pointer to look up.
AI in mathematics: Quanta Magazine, "Why the Legendary Erdős Problems Are Falling to AI", 3 August 2026.

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