Understanding the Paradox of Drug Reward in Human Evolution
Author Information
Author(s): Roger J. Sullivan, Edward H. Hagen, Peter Hammerstein
Primary Institution: California State University
Hypothesis
Are humans inherently vulnerable to drugs due to an evolutionary mismatch with plant neurotoxins?
Conclusion
The study suggests that humans have evolved mechanisms to counteract the effects of plant neurotoxins, challenging the idea that drug use is a result of an evolutionary novelty.
Supporting Evidence
- Humans have been exposed to plant neurotoxins throughout evolution.
- Cytochrome P450 genes show evidence of selection due to exposure to plant toxins.
- Commonly used drugs are often experienced as unpleasant by new users.
Takeaway
This study looks at how humans have always been around plant toxins and suggests that our bodies have learned to deal with them, which is different from the idea that drugs are new and harmful.
Methodology
The authors analyze evolutionary biology and neurobiology perspectives on drug use and reward mechanisms.
Limitations
The study does not provide experimental data to directly test the proposed hypotheses.
Digital Object Identifier (DOI)
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