IMO terms like &quot;mindset&quot; and especially &quot;self-confidence&quot; tends to understate the scope and pervasiveness of what&#x27;s going on.<p>Even ignoring stuff like disease or nutrition, I&#x27;m willing to bet you could find population-level differences in all sorts of things like pre-conscious fight&#x2F;flight response, stress hormone regulation, mental estimation of risk&#x2F;impact, and all sorts of subtle weightings for social-standing and game-theory.<p>A whole suite of adaptations on the physiological, neurological, and social level, which may be very successful... for the environment the person grew up in.