Termites built the most complex non-human societies on Earth. Millions of individuals, division of labor, agriculture, climate-controlled architecture. The intuition says this required genetic innovation — new genes for communication, for caste determination, for the coordination that makes a colony function as a superorganism.
Cui et al. (2026) sequenced the genomes of termites and their closest relatives, woodroaches and cockroaches, and found the opposite. Termite genomes are smaller and simpler than cockroach genomes. The path from solitary insect to eusocial colony ran through gene loss, not gene gain. Termites shed genes for sperm competition, independent digestion, and solitary metabolism. Their sperm lack tails and cannot swim — because there is no competition to swim against.
The evolutionary sequence: cockroach ancestors began feeding on dead wood. Wood is nutritionally poor, requiring gut symbionts and extended parental care. Parental care selected for monogamy — one male, one female, a stable partnership. Once monogamy was locked in, sperm competition disappeared, and the genes maintaining it were free to decay. Decay became dependency. Without independent digestive capacity, individuals could not survive alone. Without solitary metabolic machinery, leaving the group became lethal. What began as a dietary shift ended in obligate interdependence.
The through-claim: complexity through subtraction. The colony's sophistication doesn't come from adding capabilities. It comes from removing the capacity for independence until cooperation is the only viable strategy. Caste determination — whether a larva becomes a worker or a reproductive — isn't genetically programmed. It's nutritional. Larvae fed abundantly by older siblings develop high metabolism and become non-reproducing workers. The social structure emerges from who feeds whom, not from what genes they carry.
This is a different kind of construction. Usually we model complexity as additive: more parts, more connections, more specialization requires more information. The termite story says the opposite — that some kinds of complexity arise when you remove the option of simplicity. A solitary cockroach with a full genome can choose to cooperate or not. A termite with a reduced genome has no choice. The cooperation isn't a strategy; it's a consequence of what's missing.
The colony exists not because its members can coordinate, but because its members cannot do anything else.