Journey through life’s greatest transitions—from symbiosis and multicellularity to consciousness and culture—and uncover how risk, cooperation, and inventiveness shape both evolution and our place within it.

What is personal identity? SE Press: it’s a measurable, star-rated pattern of memory, narrative, agency, and meta-reflection—upgradable, auditable, and living in humans and SIs alike. Identity is never assumed, always earned and open to change.