agileaialanalexanalysisartbarrybestbetterbiasbigbrycebuiltbusinessbutlerceochangechriscoachingcriticaldangersdavedecisiondecisionsdisruptingdoneffectemployeesfailfuturegaryguestguestshumankleemankleinleadersleadershipleadinglessonslimitsmakemakingmanagementmichaelmulallypositivepremortemprofessorracerealrebroadcastredreillyrisksharessnowdenstrategicsuccesssystemteamteamingthingstogethertransformationsuncertaintyunlearningusingworking