Seema Mohapatra (Barry): Global Legal Responses to Prenatal Gender Identification and Sex Selection. Adam Petersen reviews In Search of the City on a Hill: The Making and Unmaking of an American Myth by Richard M. Gamble. What's wrong with gay sex? An excerpt from The Philosophy Gym by Stephen Law. How a team of scholars decrypted a secret language — and discovered the last known work of Roger Williams. Why has climate legislation failed? An interview with Theda Skocpol. Through the looking glass: When a South Korean reporter headed north across the DMZ, she entered a parallel universe that was, and remains, curiouser and curiouser. Genetic diversity exploded in recent millennia: Vast number of human DNA variants arose only in the past 5,000 years. Ed Yong on what tree-climbing pygmies tell us about foot evolution. Should you go to grad school? Ron Rosenbaum tells his story. The number of development groups trying to make the world a better place is impressive and staggering — but behind the numbers is a basic question: Which ones work?