Optimism: The Biology of Hope |
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abortion Amahuaca amygdala animals appears assertion become biological birthrates body brain breastfeeding Bushmen cave cerebellum cerebral cortex changes child circumstances commitment communities complex concerned connection consequences context contraceptive contrade cultural depression diets discussion Dordogne drugs economic effect Ethology evolution example existence experience females function future genetic human human evolution hunter-gatherers hunting hunting-gathering ical ideas implications important increase individual involved kibbutz Lascaux least Les Eyzies less lives males married ment moral mother nature nomic notion one's opiates optimism optimistic organization overall Palio parents particular pattern perhaps physiological pill placebo effect placebos political population possible presumably primates problem produce Psychiatry psychological reason relationship relatively religious reproductive response Rhesus Monkeys Robin Fox sense sexual skill social behavior society species stimulate substances suggests suicide symbols tion understanding women York