This document discusses global demography and population trends. It begins by defining key terms like demography, population, and multipolar world. It then explains that demography studies human populations with regards to size, density, distribution and vital statistics. The document discusses theories of demographic transition from high mortality and fertility rates to low rates. It notes this transition began in Europe in the 19th century and is ongoing, influenced by factors like improved health, nutrition, and economics. The transition is still ongoing in developing nations. The document also explores trends in global population like economic issues, conflicts, crime, climate change and migration.