Four global forces are changing humanity and the planet. Laurence Smith explores what life will be like if population increases to 10 million, temperature and sea level rise dramatically, and globalization continues. The most dramatic changes will occur in the New North: the Arctic Ocean and surrounding countries. Laurence C. Smith is a geographer with research interests in the Arctic, remote sensing, and hydrology. He teaches physical geography and remote sensing at UCLA. His most recent book is The New North: Four Forces Shaping the World in 2050.