Relatively Human — Season 2, Episode 2: "The City That Thinks" How do millions of selfish decisions produce urban intelligence?

Episode Description A single-celled organism with no brain, no neurons, and no nervous system built a transport network comparable to the actual Tokyo rail system. How? This episode explores the staggering reality of "emergent computation"—systems where locally blind parts produce globally intelligent outcomes without any central planning or design.

From the nonrandom statistical structure of human cities and the pheromone-driven logic of Argentine ants, to the territorial foraging patterns of plant roots, we reveal that computation does not require a computer. In these systems, the hardware, the algorithm, and the output collapse into a single physical object. The c ...