A diverse collection of links covering recent studies, news stories, and interesting facts, ranging from scientific research to policy debates to unusual historical events. Longer summary

A link roundup post covering various topics from scientific studies to current events. The post includes discussions about studies on bottled water bans, birth month effects on health, probiotics and social anxiety, Mexican drug cartels, intelligence studies, and climate change. It also covers interesting stories like Pakistan's transgender tax collectors, a 1910s plan to introduce hippo ranching in America, and various policy discussions around gun violence, university regulations, and economic studies. The post maintains a light tone while discussing serious topics, often adding humorous asides or interesting historical facts. Shorter summary

Scott Alexander examines political tribalism in America, arguing that people often claim tolerance while harboring strong prejudices against their outgroups. Longer summary

Scott Alexander explores the concept of outgroups and ingroups, arguing that people often claim to be tolerant of all groups except their perceived outgroup. He suggests that in modern American society, political tribes (Red and Blue) have become more significant than traditional demographic divisions. The essay analyzes how these tribes interact, criticize each other, and sometimes engage in self-criticism that may actually be veiled attacks on the opposing tribe. Alexander ultimately reflects on his own biases and the difficulty of genuine self-criticism and tolerance. Shorter summary