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In mechanical terms, humans are quite efficient converters…

“In mechanical terms, humans are quite efficient converters of food into energy, so human slaves were often more valuable than animal slaves, if one could afford them.21 The importance of human beings as a source of energy helps explain why forced labor was so ubiquitous in the premodern world…” quote by David Christian
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““In mechanical terms, humans are quite efficient converters of food into energy, so human slaves were often more valuable than animal slaves, if one could afford them.21 The importance of human beings as a source of energy helps explain why forced labor was so ubiquitous in the premodern world, just as the existence of fossil fuels helps explain why human slavery has largely vanished today.””

David Christian

About This Quote

This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.

Human labor was historically valued for its energy output, making people more valuable than animals when affordable; modern energy sources reduced this reliance.

In simple terms: People were once seen as energy sources, now fossil fuels replace them.

Key Takeaway

Recognize how energy economics shape labor systems.

Themes

history economics labor technology ethics

Mood

analytical reflective

Type

historical economic

When to use this quote

  • pre‑modern agriculture
  • industrialization
  • modern energy policy
  • human rights debates

Key Concepts

energy conversion human value technological change

Questions to Reflect On

  • How does energy availability influence labor practices?
  • What modern resources could reshape labor value?
A Different Perspective

The view oversimplifies complex social, cultural, and political factors beyond energy efficiency.

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