Wired

Author AJ Jacobs jokes that his specialty is being able to focus on the negative. He says he’s not alone in having a glass-half-empty personality. He says that humans are wired this way. It may have been useful to keep our eyes on dangerous predators in prehistoric times, but for modern humans, focusing on the negative leads to anxiety and depression.

--- does ‘humans are wired this way’ mean human are genetically designed in this way?