Even as Western countries band together to condemn Israel’s actions, aid remains at a trickle and the war is expanding into a central-Gazan city. We ask how the horrors might end. As with many technologies before it, many worry artificial intelligence will ultimately dumb down its human users; will it? And why so many American men are injecting testosterone.Get a world of insights by subscribing to Economist Podcasts+. For more information about how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account.