The shift toward political conservatism in old age may be a physical byproduct of the brain losing its ability to rewire itself.
April 1, 2026
Original Paper
The Neuroplasticity-fear Axis: Age-related Decline in Brain Plasticity, Amygdala-driven Decision-making, and the Neurobiology of Political Conservatism
SSRN · 6399099
The Takeaway
Researchers found that as the brain's neuroplasticity naturally declines with age, the 'fear center' (the amygdala) takes a more dominant role in decision-making. This creates a biological bias toward threat-avoidance and tribalism, though this effect is notably absent in seniors who maintain high levels of lifelong learning and intellectual activity.
From the abstract
This paper proposes a novel theoretical framework-the Neuroplasticity-Fear Axis Hypothesiswhich integrates neuroscientific findings on age-related neuroplasticity decline, amygdala-driven threat processing, and the developmental neurobiology of risk-taking to explain the welldocumented age-related shift toward political conservatism and resistance to societal change. We argue that the decline in synaptic plasticity accompanying aging, particularly in the prefrontal cortex and hippocampal regions