agingantifragilityawebarrybrainchartingcommoncompassionconnectednessconsequencescooperationcoviddacherdavidemotionsevilfeelingsguthaidthowardinequalityintelligencejonathankeltnerknowingknowledgelauramachinesmodelmythnegativenownusbaumpandemicpoliticalpositiveptpurerebroadcastreflectionsrobsonschwartzscienceselfseriessocialsolidaritysympathythinktimesuncertainwaterswiseworkworld