The concept of genome lag suggests that we have not fully caught up with the demands of the world we now inhabit. Although we spend much of our lives in confined spaces, paying bills and finishing spreadsheets, our genetics remain rooted in the fight-or-flight instincts of our caveman ancestors.
Put simply, evolution and our genetic makeup have created a misalignment between our inherited traits and our modern environment. In ancestral settings, these traits were advantageous, but in today’s context of commuting and deadlines, they can become maladaptive.
Genetic changes unfold over thousands of years, while cultural shifts occur within decades. This highlights the lag between human biology and rapid social change. Over the past decade, we have been introduced to AI, smartphones, and the rise of social media. The sudden and accelerated pace of technological development is something our genetics have not had time to adapt to. This helps explain the growing prevalence of sleep difficulties, overstimulation from artificial light, and behavioural addictions to digital media. Biologically, we are still wired for a hunter-gatherer lifestyle.
In early human societies, traits now labelled as undesirable, such as ADHD or autism, could have been beneficial. Impulsivity, hyperactivity, or intense focus may have enhanced survival. Today, however, these traits often clash with societal expectations, as well as educational and workplace demands.
Another example is our preference for carbohydrate- and calorie-rich foods. In times of scarcity, such cravings ensured survival. In the modern world, with supermarkets on every corner and calorie-dense foods readily available, these same preferences contribute to obesity and related health problems.
Our mental health is also affected. Smartphones constantly bombard us with notifications and create pressure to remain permanently connected. This leads to stress and fatigue, in stark contrast to our genetics, which were designed for short bursts of adrenaline, not prolonged, low-level stressors like endless spreadsheets.
Recognising genome lag can help us understand our predispositions and design interventions that support adaptation. Strategies such as mindfulness and digital detoxification can help mitigate these effects. On the other hand, there are ethical concerns, as some companies exploit these vulnerabilities through addictive apps designed to keep us endlessly engaged. Our bodies, built for short-term stress, instead face chronic exposure, increasing the risk of anxiety and depression.
Examples of genome lag also exist in non-human species. The dodo, for instance, was perfectly adapted to its environment in Mauritius, but when humans arrived and preyed on its eggs, the species could not adjust quickly enough, leading to extinction.
Yet, despite these challenges, humans demonstrate remarkable adaptability. Communities come together to heal, rebuild, and draw upon shared values and traditions for a sense of purpose. Art and creative writing provide further avenues for processing trauma, offering cultural expressions of resilience.
Genome lag may expose us to difficulties that our biology was not designed to manage. However, by acknowledging its effects and adapting creatively, we continue to evolve as a resilient and resourceful species.
Ayten Nevzat is a psychology lecturer with an MSc whose academic interests include cognition, neurodiversity, and health psychology. She promotes critical thinking through a humanistic teaching style and is planning to pursue a PhD in psychology.
