Slaves
Concept
Described as a better form of capital than inanimate goods due to universality and mobility, though with uncertain value, forming a basic economy.
Mentioned in 2 videos
Videos Mentioning Slaves

Secret History #15: Capital and the Bronze Age Collapse
Predictive History
Described as a better form of capital than inanimate goods due to universality and mobility, though with uncertain value, forming a basic economy.

Game Theory #15: The Return of History
Predictive History
Historically, human beings were used as a source of energy when cheap oil was unavailable; this re-emergence is considered a possibility in a low-energy future.