Eusociality
진사회성
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<speciesfyi-glossary slug="eusociality"></speciesfyi-glossary>Definition
The highest level of social organization in insects, featuring cooperative brood care, overlapping generations, and reproductive division of labor.
Detailed Explanation
Eusociality has evolved independently at least 12 times in insects and also in shrimp and mole rats. Haplodiploidy in Hymenoptera (bees, wasps, ants) — where unfertilized eggs become males and fertilized eggs become females — means sisters share 75% of genes, making kin selection a strong driver. The evolution of eusociality from solitary ancestors is one of evolutionary biology's most studied and debated transitions.