After more than a decade of stability or improvement, the mental health of adolescents plunged in the early 2010s, with rates of depression, anxiety, self-harm, and suicide rising sharply. The author lays out the facts about the epidemic of teen mental illness that hit many countries at the same time, and then investigates the nature of childhood, including why children need play and independent exploration to mature into competent, thriving adults....

Estados Unidos es el tercer país más poblado del mundo y la economía nacional más grande del planeta en términos de Producto Interior Bruto. En apenas doscientos años, su historia ha experimentado una evolución de vértigo: comenzó como un reducto de pequeñas colonias británicas para convertirse en la potencia hegemónica actual. Un desarrollo inicial marcado por batallas contra el invasor inglés, cruentas guerras civiles, confrontaciones...

"In the late nineteenth century, close diplomatic relations existed between the United States and Russia. That changed when George Kennan went to Siberia in 1885 to investigate the exile system and he learned of the brutality Russia was wielding to suppress dissent. Over ten months, he traveled eight thousand miles, enduring sandstorms and blizzards. His interviews with convicts and political exiles revealed how Russia ran on inflicted pain and...