Evolutionary hypothesis proposing that ADHD traits like impulsivity and hyperfocus were advantageous for hunter-gatherers but became maladaptive in farming societies. Suggests ADHD is not a disorder but an evolutionary mismatch, with hunter brain traits suited for different environmental demands than modern agricultural civilization.
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The hunter versus farmer hypothesis is a proposed explanation for the nature of attention-deficit hyperactivity disorder (ADHD), first suggested by radio host and author Thom Hartmann in his book "Attention Deficit Disorder: A Different Perception."
The hypothesis notes that humans spent most of their evolutionary history in hunter-gatherer societies, and argues that ADHD represents a lack of adaptation to farming societies rather than a true disorder.
Thom Hartmann's theory states that ADHD is not, in fact, a disorder as we've largely classified it. Instead, it's the result of evolution. ADHD individuals simply have brains that evolved for different purposes than neurotypical individuals (farmers).
Many of the typical traits attributed to ADHD — such as impulsivity and novelty-seeking — were beneficial at a time when our forebears were struggling to survive in harsh and uncertain pre-agricultural, subsistence environments.
Hyperfocus Experts note that hyperfocusing was advantageous to those in hunter societies, as it conferred superb hunting skills and a prompt response to predators.
Urgency Response Glickman & Dodd (1998) found that adults with self-reported ADHD scored higher than other adults on self-reported ability to hyperfocus on "urgent tasks", such as last-minute projects or preparations. Adults in the ADHD group were uniquely able to postpone eating, sleeping and other personal needs and stay absorbed in the "urgent task" for an extended time.
Nomadic Advantages A study of the Ariaal tribe in Kenya found that the still-nomadic members who had the variant allele (associated with ADHD) were generally healthier than those who lacked it.
These theories suggest that traits which are specific to individuals diagnosed with ADHD increased the fitness of carriers in an ancestral environment and therefore spread in the population due to natural selection.
However, as a result of the astonishingly fast cultural evolution of the human species and subsequent environmental changes, particularly in the last 10,000 years, ADHD traits have become maladaptive in present-day societies.
Hyperfocus is not suited to modern life in an industrial society, where sustained attention to routine tasks is often required.
Not Hard Science Hartmann first developed the idea as a mental model after his own son was diagnosed with ADHD, stating, "It's not hard science, and was never intended to be."
Evolutionary Evidence A 2020 study found that ADHD allele frequency has been decreasing for up to 35,000 years, indicating negative selection rather than positive selection for these traits.
Understanding this theory can help individuals with ADHD:
Not applicable - this is a theoretical framework, not a commercial product.