Runners-Up & Wildcards
These species show intriguing abilities but face near-insurmountable barriers to civilization.
Cephalopods: Octopuses
Strengths: incredible manipulation and problem-solving. Barriers: aquatic life, short lifespan, weak cultural transmission, no fire.
Parrots: Kea and African Greys
Strengths: vocal learning, tool use, long lifespan. Barriers: flight, feathers, and awkward manipulation.
Pigs
Strengths: high intelligence, omnivory, sociality. Barrier: hooves cannot finely manipulate tools.
Rats
Strengths: prolific, adaptable, problem-solving. Barriers: short lifespan, small body size, no vocal learning.