Abigail Marsh’s research reveals that extreme altruists—like anonymous kidney donors and spontaneous rescuers—possess distinct neurobiological traits: heightened amygdala reactivity and superior fear recognition in others’ faces, contrasting sharply with psychopathic profiles. These individuals don’t weigh risks or seek reward; they perceive distress as an immediate call to action, extending care equally to strangers and loved ones. Altruism isn’t rare or irrational—it’s rooted in evolutionary alloparenting, grows with societal well-being, and is increasingly visible in everyday acts like blood donation and crisis response. Courage isn’t fearlessness but acting *despite* fear, grounded in moral conviction and reinforced through practice. Small, local acts of generosity build momentum for larger impact, and altruism itself is self-reinforcing: helping makes us more likely to help again. Marsh’s own ski hill rescue of her child underscores how deeply instinctive and accessible such compassion can be.