Bronze Age (2.000 BCE)

Parent universe: Reality

Value: 0.36
Min: 0.3
Max: 0.4
Confidence: CalculatedGuess

Life a bit easier, less calories. Pottery, no energy consuming industry. But some ovens and plow pulling farm animals. Still 200 W.

Value: 20e6
Min: 10e6
Max: 40e6
Confidence: Canon

References:

Quick Wikipedia research. Error bars guestimated.

Still hunter gatherers and small commnities, but there have been cities for thousands of years.